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1. Turn off all the lights and you will not pay more money.

If ..........................................................................................................

2. Unless she wears warm clothes, she will have a cold.

If ..........................................................................................................

3. Be careful or you may have an accident.

If ..........................................................................................................

4. phone your parents or you have a trouble.

If ..........................................................................................................

5. Unless she whispers, everyone knows what she is saying.

If ..........................................................................................................

6. Stay here and you will feel save.

If ..........................................................................................................

7. Pay electricity bill today or your electricity will be cut off.

If ..........................................................................................................

8. Stop smoking otherwise your cough may be worse.

If ..........................................................................................................

9. Unless we use less fossil fuel, they will be run out soon.

If ..........................................................................................................

10. Unless it stops raining today, we may be faced with a serious flood.

If ..........................................................................................................

1
2 tháng 10 2018

1. Turn off all the lights and you will not pay more money.

If you turn off all the lights, you will not pay more money

2. Unless she wears warm clothes, she will have a cold.

If she doesn't wear warm clothes, she will have a cold

3. Be careful or you may have an accident.

If you aren't careful, you may have an accident

4. phone your parents or you have a trouble.

If you don't phone your parents, you will have a trouble

5. Unless she whispers, everyone knows what she is saying.

If she doesn't whispers, everyone knows what she is saying

6. Stay here and you will feel save.

If you stay here, you will feel safe

7. Pay electricity bill today or your electricity will be cut off.

If you don't pay electricity bill today, your electricity will be cut off

8. Stop smoking otherwise your cough may be worse.

If you don't stop smoking, your cough may be worse

9. Unless we use less fossil fuel, they will be run out soon.

If we don't use less fossil fuel, they will be run out soon

10. Unless it stops raining today, we may be faced with a serious flood.

If it doesn't stop raining today, we may be faced with a serious flood

21 tháng 1 2021

dung ko ta

 

ha

1. Turn off all the lights and you will not pay more money.If ..........................................................................................................2. Unless she wears warm clothes, she will have a cold.If ..........................................................................................................3. Be careful or you may have an accident.If ..........................................................................................................4. phone your...
Đọc tiếp

1. Turn off all the lights and you will not pay more money.
If ..........................................................................................................
2. Unless she wears warm clothes, she will have a cold.
If ..........................................................................................................
3. Be careful or you may have an accident.
If ..........................................................................................................
4. phone your parents or you have a trouble.
If ..........................................................................................................
5. Unless she whispers, everyone knows what she is saying.
If ..........................................................................................................
6. Stay here and you will feel save.
If ..........................................................................................................
7. Pay electricity bill today or your electricity will be cut off.
If ..........................................................................................................
8. Stop smoking otherwise your cough may be worse.
If ..........................................................................................................
9. Unless it stops raining today, we may be faced with a serious flood.
If ..........................................................................................................
10.Do morning exercises regularly, your body will be fitter.
If ..........................................................................................................
 

1
30 tháng 8 2021

1. If you turn off all lights, you will not pay more money.

2. If she doesn't wear warm clothes, she will have a cold.

3. If you aren't careful, you may have an accident

4. If you don't phone your parents, you will have a trouble

5. If she doesn't whisper, everyone will know what she is saying

6. If you stay here, you will feel safe

7. If you pay electricity bill today, your electricity will not be cut off

8. If you stop smoking, your cough may not be worse

9. If it doesn't stop raining today, we may be faced with a serious flood

10 If you do morning exercises regularly, your body will be fitter

Transformation: 1. Take exercise regularly and you will feel healthier. - If you 2. Leave now, or you'll be late for class. - If 3. You go to bed now, or your cold will get worse. - If 4. Save electricity, or you'll pay much per month. - If 5. Unless he phones now, he'll get no information. - If 6. Don't try to clean this cloth, or it may lose its color. - If 7. Water these plants properly, or they won't grow well. - If 8. Study hard, or you'll fail in the next exam. - If 9....
Đọc tiếp

Transformation: 1. Take exercise regularly and you will feel healthier. -> If you 2. Leave now, or you'll be late for class. -> If 3. You go to bed now, or your cold will get worse. -> If 4. Save electricity, or you'll pay much per month. -> If 5. Unless he phones now, he'll get no information. -> If 6. Don't try to clean this cloth, or it may lose its color. -> If 7. Water these plants properly, or they won't grow well. -> If 8. Study hard, or you'll fail in the next exam. -> If 9. Emma may miss the train. But she can get the next one. -> If 10. The children mustn't go near Nick's dog. It'll bite them. -> If 11. He should study medicine and surgery because he wants to be a doctor. -> If 12. He will not get good grades because he doesn't prepare his lesson carefully →If he 13. My uncle can't buy that house because he is poor. -> If my uncle 14. He can't speak English well because he has no chance to practice -> If he 15. Kate won't come to the party because she is sick -> If Kate 16. She doesn't have tickets, so she won't take us to the zoo. -> If she 17. My friend can't join the trip, so he won't write to me -> If my friend 18. It isn't fine now, so we won't have a picnic in the meadow -> If it 19. We don't have a bicycle, so we don't go there for a picnic -> If we 20. She is not on board now, so she can't experience these marvelous -> If she 21. We don't have enough money to go on holiday -> If we 22. You are not tall enough to reach that shelf -> If you were 23. You should work hard on the pronunciation. -> If I 24. You shouldn't tell him the truth. -> If I 25. I think you shouldn't play games too much. -> If I 26. I think you should spend less money on luxurious phones. -> If I

1
5 tháng 2 2023

 1. Take exercise regularly and you will feel healthier.

-> If you take exercise regularly, you will feel healthier

2. Leave now, or you'll be late for class

. -> If you don't leave now, you'll be late for class

3. You go to bed now, or your cold will get worse.

-> If you go to bed now, your cold won't get worse

4. Save electricity, or you'll pay much per month.

-> If you don't save electricity, you will pay much per month

5. Unless he phones now, he'll get no information

. -> If he phones now, he will get information

6. Don't try to clean this cloth, or it may lose its color.

-> If you clean this cloth, it may lose its color

7. Water these plants properly, or they won't grow well

. -> If you don't water these plants properly, they won't grow well

8. Study hard, or you'll fail in the next exam.

-> If you don't study hard, you'll fail in the exam

9. Emma may miss the train. But she can get the next one.

-> If Emma misses the train, she can get the next one

10. The children mustn't go near Nick's dog. It'll bite them.

-> If the children go near Nick's dog, it'll  bite them

11. He should study medicine and surgery because he wants to be a doctor.

-> If he wants to be a doctor, he should  study medicine and surgery

12. He will not get good grades because he doesn't prepare his lesson carefully

→If he doesn't prepare his lesson carefully, he will not get good grades

13. My uncle can't buy that house because he is poor.

-> If my uncle weren't poor, he could buy that house

14. He can't speak English well because he has no chance to practice

-> If he had a chance to practice, he could speak English well

15. Kate won't come to the party because she is sick

-> If Kate weren't sick, she would come to the party

16. She doesn't have tickets, so she won't take us to the zoo.

-> If  she had tickets, she would take us to the zoo

17. My friend can't join the trip, so he won't write to me

-> If my friend could join the trip, he would write to me

18. It isn't fine now, so we won't have a picnic in the meadow

-> If it were fine now, we would have a picnic in the meadow

19. We don't have a bicycle, so we don't go there for a picnic

-> If we had a bicycle, we would go there for a picnic

20. She is not on board now, so she can't experience these marvelous

-> If she were on board now, she could experience these marvelous

21. We don't have enough money to go on holiday

-> If we had enough money, we would go on holiday

22. You are not tall enough to reach that shelf

-> If you were tall enough, you could reach that shelf

23. You should work hard on the pronunciation

-> If I were you, I would work hard on the pronunciation

24. You shouldn't tell him the truth.

-> If I were you, I wouldn't tell him the truth

25. I think you shouldn't play games too much.

-> If I were you, I wouldn't play games too much

26. I think you should spend less money on luxurious phones.

-> If I were you, I would  spend less money on luxurious phones.

21 tháng 12 2019

1 should it be warm tomorrow,we will have a pinic

2 should your cold becom worse,you must see the doctor

3 should you take part in the english club,your speaking skill will be improved

4 should you not keep your feet dry,you will have a cold

5 should you want to go out tonight,make up your room

6 should he make more mistakes ,i'll be very angry

7 should you leave your house unlocked,it will be broken into

8 should she forget her bool,she can share with me

9 should you not turn down the radio ,you will wake the baby up

10 should you be asked to sing an english song,what will you do?

11 should someone break into your house ,will you phone the police first?

12 should he ask to bring hot water,i will tell him to wait for five munities

7 tháng 7 2021

31. . Be careful or you may have an accident.

ð If ...you aren't careful, you may have an accident.

32. . phone your parents or you have a trouble.

ð If you don't phone your parents, you have a trouble.

33. . She doesn’t have enough money, so she can’t buy that book

ð If she had enough money, she could buy that book

34. She can't go to school today because she is ill.

ð If she weren't ill, she could go to school today 

35. We don’t go on holiday because the weather is bad.

à If the weather weren't bad, we would go on holiday

36. We got lost in the jungle because we didn’t have a map.

-> If we had had a map, we wouldn't have got lost in the jungle

37. Work hard and you will pass the exam.

@ If you work hard, you will pass the exam.

38. If we get a key , we will able to get into the house.

=> Unless we get a key, we will not be able to get into the house.

39. My advice is that Mary should apply for that job.

=> If I were Mary, I would apply for that job.

40. Unless the weather is bad, we’ll go on a picnic tomorrow.

=> If the weather isnt' bad,  we’ll go on a picnic tomorrow.

41. Why don’t you use energy-saving bulbs?

=> If I were you, I would use energy-saving bulbs

42. I want to have a new computer, but I don’t have enough money.

=> If I had enough money, I would have a new computer

22 tháng 11 2021

1.   Recycle and we will save natural resources. 

→ If we recycle, we will save natural resources. 

2.Hurry up or you will be late for work

→ If you don't hurry up, you will be late for work

→ Unless you hurry up, you will be late for work

3.     Don’t leave the lights all night or you’ll waste electricity.

→ If you  leave the lights all night, you’ll waste electricity.

4.     You can improve your English by practicing speaking English every day.

→ If you practice speaking E everyday, you can improve your ENglish

5.     Phone me tonight or he won’t get any information. 

→ If he doesn't phone me tonight, he won’t get any information. 

→Unless he phones me tonight, he won’t get any information. 

6. “Where are you living now?” I said to him 

→ I asked him where he was living then

7.“What do you do to improve your English?” the examiner asked me. 

→ The examiner asked me what I did to improve my English

8. “Will you finish these reports for me tomorrow, Mary?” said Peter  

→ Peter asked Mary if she would finish thóe reports for him the day after

9.“I must stay at home tonight to do my homework” said John.

→ John said ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­he had to stay at home that night to do his homework

10. “You can use my telephone if you need it.” said Lan to me    

→ Lan told me I could use her telephone if I needed it

1 If I see him I (give) him a lift. 2 The table will collapse if you (stand) on it. 3 If he (eat) all that he will be ill. 4 If I find your passport I (telephone) you at once. 5 The police (arrest) him if they catch him. 6 If he (read) in bad light he will ruin his eyes. 7 Someone (steal) your car if you leave it unlocked. 8 What will happen if my parachute (not open)? 9 If he (wash) my car I'll give him £10. 10 If she (need) a radio she can borrow mine. 11. If you (not go) away I'll send for...
Đọc tiếp

1 If I see him I (give) him a lift.
2 The table will collapse if you (stand) on it.
3 If he (eat) all that he will be ill.
4 If I find your passport I (telephone) you at once.
5 The police (arrest) him if they catch him.
6 If he (read) in bad light he will ruin his eyes.
7 Someone (steal) your car if you leave it unlocked.
8 What will happen if my parachute (not open)?
9 If he (wash) my car I'll give him £10.
10 If she (need) a radio she can borrow mine.

11. If you (not go) away I'll send for the police.

12. I'll be very angry if he (make) any more mistakes.

13. If he (be) late we'll go without him.

14. She will be absolutely furious if she (hear) about this.

15. If you put on the kettle I (make) the tea.

16. If you give my dog a bone he (bury) it an once.

17. If we leave the car here it (not be) in abybod's way.

18. He'll be late for the train if he (not start) at once.

19. If you come late they (not let) you in.

20. If he (go) on telling lies nobody will believe a world he says.

21. Unless he (sell) more he won't get much commission.

22. If I lend you Ł10 when you (repary) me?

23. We'll have to move upstairs if the rivier (rise) any higher.

24. If he (work) hard today can he have a holiday tomorrow?

25. Ice (turn) to water if heat it.

26. If the house (burn) down we can claim compensation.

27. If you (not like) this one I'll bring you another.

28. Unless you are more careful you (have) an accident.

29. Tell him to ring me up iy you (see) him.

30. If I tell you a secret, you (promise) not to tell it to anyone else?

31. If you (not believe) what I say, ask your mother.

32. If he (like) the house will he buy it?

33. If you will kindly sit down I (make) enquiries for you.

34. Unless I have a quiet room I (not be able) to do any work.

35. She won't open the door unless she (know) who it is.

36. Should you require anything else please (ring) the bell for the attendant

3
18 tháng 7 2019

1 If I see him I (give)will give him a lift.
2 The table will collapse if you (stand)stand on it.
3 If he (eat)eats all that he will be ill.
4 If I find your passport I (telephone)wil telephone you at once.
5 The police (arrest)will arrest him if they catch him.
6 If he (read) reads in bad light he will ruin his eyes.
7 Someone (steal) will steal your car if you leave it unlocked.
8 What will happen if my parachute doesn't open (not open)?
9 If he (wash)washes my car I'll give him £10.
10 If she (need)needs a radio she can borrow mine.

11. If you (not go) don't go away I'll send for the police.

12. I'll be very angry if he (make)makes any more mistakes.

13. If he (be)is late we'll go without him.

14. She will be absolutely furious if she (hear)hears about this.

15. If you put on the kettle I (make)will make the tea.

16. If you give my dog a bone he (bury) will bury it an once.

17. If we leave the car here it (not be)will be in abybod's way.

18. He'll be late for the train if he (not start)doesn't start at once.

19. If you come late they (not let)don't let you in.

20. If he (go) goes on telling lies nobody will believe a world he says.

21. Unless he (sell) sells more he won't get much commission.

22. If I lend you Ł10 when you (repary)wiil repary me?

23. We'll have to move upstairs if the rivier (rise)rises any higher.

24. If he (work)works hard today can he have a holiday tomorrow?

25. Ice (turn)will turn to water if heat it.

26. If the house (burn)burns down we can claim compensation.

27. If you (not like)don't like this one I'll bring you another.

28. Unless you are more careful you (have)will have an accident.

29. Tell him to ring me up iy you (see)see him.

30. If I tell you a secret, you (promise)will promise not to tell it to anyone else?

31. If you (not believe)won't believe what I say, ask your mother.

32. If he (like) likes the house will he buy it?

33. If you will kindly sit down I (make)makes enquiries for you.

34. Unless I have a quiet room I (not be able)won't be able to do any work.

35. She won't open the door unless she (know)knows who it is.

36. Should you require anything else please (ring)ring the bell for the attendant

18 tháng 7 2019

1 If I see him, I WILL GIVE him a lift.
2 The table will break if you SIT on it.
3 If he EATS all that, he will be ill.
4 If I find your passport, I will telephone you.
5 The police WILL ARREST him, if they catch him.
6 If he READS in bad light, he will ruin his eyes.
7 Someone WILL STEAL your car if you leave it unlocked.
8 What will happen if my parachute DOES NOT OPEN?
9 If he WASHES my car, I'll give him $10.
10 If she NEEDS a radio, she can borrow mine.
11 If you DO NOT GO away, I'll call the police.
12 I'll be very angry if he MAKES any more mistakes.
13 If he IS late, we'll go without him.
14 She will be absolutely furious if she HEARS about this.
15 If you put on the kettle, I WILL MAKE some tea.
16 If you give my dog a bone, he WILL BURY it.
17 If we leave the car here, it WON'T BE in anybody's way.
18 He'll be late for the train if he DOESN'T START at once.
19 If you come late, they WON'T LET you in.
20 If he GOES on telling lies, nobody will believe a word he says.
21 Unless he SELLS more, he won't get much commission.
22 If I lend you $10, when WILL you REPAY me?
23 We'll have to move upstairs if the river RISES any higher.
24 If he WORKS hard today, can he have a holiday tomorrow?
25 Ice TURNS to water if you heat it.
26 If the house BURNS down, we can claim compensation.
27 If you DON'T LIKE this one, I'll bring you another.
28 Unless you are more careful, you WILL HAVE an accident.
29 Tell him to ring me up if you WILL SEE him.
30 If I tell you a secret, WILL you PROMISE not to tell it to anyone else?
31 If you DON'T BELEIVE what I say, ask your mother.
32 If he LIKES the house, will he buy it?
33 If you kindly sit down, I WILL MAKE enquiries for you.
34 Unless I have a quiet room, I WON'T BE ABLE to do any work.
35 She won't open the door unless she KNOWS who it is.
36 Should you require anything else, please RING the bell for the attendant.

1)She loves him, so she forgives him easily. If........................................................................... 2)It rains, so the children don't go swimming. If............................................................................ 3)They don't behave themselves, so their parents are not happy about that. If............................................................................ 4)If you didn't speak quickly, I could understand...
Đọc tiếp

1)She loves him, so she forgives him easily.

If...........................................................................

2)It rains, so the children don't go swimming.

If............................................................................

3)They don't behave themselves, so their parents are not happy about that.

If............................................................................

4)If you didn't speak quickly, I could understand you.

Unless....................................................................

5)If you don't have money, I can lend you some.

Unless.....................................................................

6)Hurry up or we will miss the bus.

If we.........................................................................

7)Do the test carefuly or you may get bad mark.

If you.......................................................................

8)Come soon or you may not meet us.

If you........................................................................

9)If you don't study hard, you may fail the exam.

Unless........................................................................

10)I don't have the key, so I can't get into the house.

Unless........................................................................

11)Unless Nga hurries, she will miss the last train.

If Nga..........................................................................

12)Mary doesn't buy this shirt because she doesn't have enough money.

If Mary.........................................................................

13)Tom eats too much, so he gets fat.

If Tom..........................................................................

14)She doesn't work hard, so she doesn't get good marks.

If...................................................................................

15)Unless he phones her immediately, he won't get information.

If...................................................................................

16)Unless he apologize, I'll never invite him herre again.

If..................................................................................

17)Speak slowly or he can't understand what you mean.

If you...........................................................................

18)Keep our environment clean or we won't enjoy a healthy life.

If we............................................................................

19)I'm not a millionaire, so I can't buy you a car.

If I................................................................................

20)He will get wet unless he puts the raincoat on.

If he............................................................................

21)Today is not a holiday, so we can't go for a picnic.

If................................................................................

22)He won't do that because you don't permit him.

He would....................................................................

1
28 tháng 5 2018

1. I haven't got money , so I'm not going on holiday

- If I had enough money I would go on holiday.

2. He often gets bad marks because he is lazy

-> If he isn't lazy, He will not get bad marks.

3. Do it now , or you will not finish it on time

-> If you don't do it now, you won't finish it on time.

4. Hurry up , or we will be late for the exam

-> If we don't hurry up, we will be late for the exam.

5. Be quiet , or you will not understand the lesson

-> If you weren't quite, you won't understand the lesson.

6. They do not understand you because you do not often talk to them

-> If you often talk to them, they will understand you.

7. The office may be closed , so Mark won't be able to get in

-> If the office are closed , Mark won't be able to get in.

8. You can't look the work up because you haven't got a dictionary

-> If I had a dictionary, I could look the word up.

9. He didn't hurry , so he missed the train

-> If he had hurried , he wouldn't have missed the train .

10. We canceled our picnic because it rained very hard yesterday

-> If it rained very hard yesterday , we would cancele our picnic

11. I wasn't at home yesterday , I didn't see my old friends

-> If I didn't see my old friends , I would not at home yesterday

12. They don't behave themselves so their parents are not happy about that

-> If their parents are not happy about that, They don't behave themselves

13. She didn't say sorry so she was angry

-> If she was angry , she would not say sorry

14 . It raines last night so I didn't go to the barbecue

-> If I didn't go the the barbecue , It would rain last night

15. She doesn't play attention to her coooking so the food is horrible

-> If the food is horrible , She won't play attention to her cooking

16. The weather was very nice so we didn't go camping

-> If the weather was very nice , we wouldn't go camping

17. The computer broke down and I had to stop my work

-> If the computer broke down , I had stopped my work

18. She love him so she forgives him easily

-> If she love him , she will forgive him easily

còn vài câu mình chưa làm được

28 tháng 5 2018

mình thấy nó không giống ýoho

1) he speak very quickly so i can't understand him -> if 2) i don't knoww his address , that's why i can't visit him ->ì 3) do your homework ỏ you will be punished by the teacher ->ì 4) tell the police the truth , they will believe rou ->Ì 5) keep your feet dry or you will believe you ->ì 6) learn hard or you will get a cold ->ìf 7)save the electricity or wqe have run out of energy ->ìf 8)don't throw the trash in the street , the air will be polluted ->if 9) if save don't...
Đọc tiếp

1) he speak very quickly so i can't understand him

-> if

2) i don't knoww his address , that's why i can't visit him

->ì

3) do your homework ỏ you will be punished by the teacher

->ì

4) tell the police the truth , they will believe rou

->Ì

5) keep your feet dry or you will believe you

->ì

6) learn hard or you will get a cold

->ìf

7)save the electricity or wqe have run out of energy

->ìf

8)don't throw the trash in the street , the air will be polluted

->if

9) if save don't keep your feet dry , you will be catch a cold

->unless

10) she will get good mark if she leans harder and harder

->unless

11) they will be died if they aren't taken to the hospital

->unless

12) we will have a picnic unless it rains

->if

13)i will buy that book if it isn't so expensive

->unless

14) they will not help you if they don't have time

->if they have

->unless

15) he is overweight beacause he eats so much chocolate

->ìf

16) i mised the bus this morning , so i was be late for class

->if

17) he didn't pass the exam becausr he didn't work hark

->ìf

18) he didn't wear glove so the police caught him

->if

19) i was drowning , but he saved me

_if

20) i will only help you if promise to try harder

-> if

làm hộ mk nha cần gấp !!!

4
3 tháng 8 2018

1) he speak very quickly so i can't understand him

-> if he didn't speak very quickly, l could understand him.

2) i don't knoww his address , that's why i can't visit him

->If l knew his address, l could visit him.

3) do your homework ỏ you will be punished by the teacher

->If you don't do your homework, you will be punished by the teacher.

4) tell the police the truth , they will believe rou

->If you don't tell the police the truth,they will believe rou

5) keep your feet dry or you will believe you

->if you don't keel your feet dry ,you will believe you.

6) learn hard or you will get a cold

->ìf you don't learn hard,you will get a cold.

7)save the electricity or wqe have run out of energy

->ìf we don't save the electricity, we have run out of energy.

8)don't throw the trash in the street , the air will be polluted

->if you throw the trash in the street, the air will be polluted.

9) if save don't keep your feet dry , you will be catch a cold

->unless save keeps your feet dry,you will be catch a cold.

10) she will get good mark if she leans harder and harder

->unless she learns harder and harder, she won't get good mark.

11) they will be died if they aren't taken to the hospital

->unless they are taken to the hospital, they will be died.

12) we will have a picnic unless it rains

->if it doesn't rain,we will have a picnic.

13)i will buy that book if it isn't so expensive

->unless it is so expensive, l will buy that book

14) they will not help you if they don't have time

->if they have time ,they will help you.

->unless

15) he is overweight beacause he eats so much chocolate

->ìf he didn't eat so much chocolate, he wouldn't be overweight.

16) i mised the bus this morning , so i was be late for class

->if l hadn't missed the bus this morning, l wouldn't have been late for class.

17) he didn't pass the exam becausr he didn't work hark

->ìf he had worked hard,he would have passed the exam.

18) he didn't wear glove so the police caught him

->if he had worn glove,the police wouldn't have caught him

19) i was drowning , but he saved me

_if l hadn't been drowning, he wouldn't have saved me.

20) i will only help you if promise to try harder

-> if you promised to try harder, l will only help you.

làm hộ mk nha cần gấp !!!

3 tháng 8 2018

bucminh

22 tháng 2 2023

you work hard, you will fail the exams. 

you do not save any money, you will not be able to buy the house. 

you behave yourself, your parents will be very unhappy. 

If you do not have your hair cut, they will not let you in.

you do it carefully, you will feel sorry afterwards. 

you do not ask him first, he won't offer to help. 

you go out more, you will fail ill. 

you take a hat with you, you will be caught in the rain on the way back. 

you do not write it again more carefully, he will not be able to read it. 

you have another look at those lessons, you will get bad marks.