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4 tháng 1 2019

Rewrite sentence

1. I advice you to pay more attention to the road when driving

-> If I ____were you, I would pay more attention to the road when driving____

2. You'll have a headache tomorrow if you watch too much TV

-> Unless you stop ___watching too much TV, you'll have a headache tomorrow__

3. We don't have a garden, so we don't grow our own vegetables

-> If we ___have a garden, we will grow our own vegetables _____

4. Don't leave the milk out of the fridge or it'll go off

-> If _____you leave the milk out of the fridge, it 'll go off_____

5. Give me all your money or I'll kill you

-> Unless ____you give me all your money, I'll kill you____

6. I'm too busy to go out with you this evening

-> If I ___amn't too busy this evening, I'll go out with you____

7. He doesn't give you good advice because he isn't your true friend

-> If he ____gived you good advice, he would be your true friend____

4 tháng 1 2019

Bạn ơi mình nghĩ câu 3 và 6 dùng điều kiện loại 2 chứ ạ

3. If we had a garden, we would grow our own vegetables

6. If I weren't too busy this evening, I would go out with you

EX3. 1. You could make better progress if you... (attend) class regularly 2. If I .... (know) his telephone number, I'd give it to you 3. If he worked more slowly, he... (not make) so many mistakes 4. I shouldn't drink that wine if I... (be) you 5. If someone (give).... you a boat, what you (do)....? 6. If you are kind to me, I (be)... good to you 7. He (come).... if you waited 8. If you (ring) ... the bell, the servant would come 9. It is (not, rain)... a lot, the rice crop wouldn't...
Đọc tiếp

EX3.

1. You could make better progress if you... (attend) class regularly

2. If I .... (know) his telephone number, I'd give it to you

3. If he worked more slowly, he... (not make) so many mistakes

4. I shouldn't drink that wine if I... (be) you

5. If someone (give).... you a boat, what you (do)....?

6. If you are kind to me, I (be)... good to you

7. He (come).... if you waited

8. If you (ring) ... the bell, the servant would come

9. It is (not, rain)... a lot, the rice crop wouldn't grow

10. If today (be) .... Sunday, we wouldn't have to work

EX4:

1. Keep silent or you'll wake the baby up

-> If.......................

2. Stop talking or you won't understand the lesson

-> If................

3. I don't know her number, so I don't ring her up

-> If.....................

4. I don't know the answer, so I can't tell you

->.........................

5. We get lost because we don't have a map

-> If...................

6. Susan felt sick because she ate four cream cakes

->If............................

7. If anyone didn't come, we would phone you at once

-> Unless.................

8. If we had enough rain, we couldn't grow rice

-> Unless......................

1
31 tháng 8 2020

EX3.

1. You could make better progress if you...attended (attend) class regularly

2. If I .knew... (know) his telephone number, I'd give it to you

3. If he worked more slowly, he..wouldn't make. (not make) so many mistakes

4. I shouldn't drink that wine if I.were.. (be) you

5. If someone (give)..gave.. you a boat, what would you (do)...do.?

6. If you are kind to me, I (be).will be.. good to you

7. He (come).would come... if you waited

8. If you (ring) rang..the bell, the servant would come

9. It is (not, rain)... a lot, the rice crop wouldn't grow -> sai đề rồi

10. If today (be) were..Sunday, we wouldn't have to work

EX4:

1. Keep silent or you'll wake the baby up

-> If...you don't keep silent,you'll wake the baby up...........

2. Stop talking or you won't understand the lesson

-> If....you don't stop talking,you won't understand the lesson.......

3. I don't know her number, so I don't ring her up

-> If..I knew her number,I would ring her up...................

4. I don't know the answer, so I can't tell you

->...If I knew the answer,I could tell you......................

5. We get lost because we don't have a map

-> If....we had a map,we wouldn't get lost...............

6. Susan felt sick because she ate four cream cakes

->If...Susan hadn't eaten four cream cakes,she wouldn't have felt sick...........

7. If anyone didn't come, we would phone you at once

-> Unless...anyone came,we would phone you at once..............

8. If we had enough rain, we couldn't grow rice

-> Unless...we had enough rain,we couldn't grow rice.................

(nhưng câu 8 cũng sai đề rồi :))) phải là if we didn't have enough rain,we couldn't grow rice thì đáp án mới như trên)

REWRITE THE FOLLOWING SENTENCES USING IF-> UNLESS TYPE1 1. If he doesn't hurry, he will be late for school -> unless 2. unless it stops raining, we won't go out -> if 3. you will get success if you are patient - unless 4. those flowers will die if nobody waters them - unless 5. no one can help him if he doesn't tell the truth - unless 6. you will catch a cold unless you keep your feet dry - if 7. if i don't catch the plane, i will not be home by five - unless 8. if you don't apologize, i will...
Đọc tiếp

REWRITE THE FOLLOWING SENTENCES USING IF-> UNLESS
TYPE1
1. If he doesn't hurry, he will be late for school
-> unless
2. unless it stops raining, we won't go out
-> if
3. you will get success if you are patient
- unless
4. those flowers will die if nobody waters them
- unless
5. no one can help him if he doesn't tell the truth
- unless
6. you will catch a cold unless you keep your feet dry
- if
7. if i don't catch the plane, i will not be home by five
- unless
8. if you don't apologize, i will never speak to you again
-unless
9. unless he gives me his number, i won't phone him
- if
10. he cannot do that exercise if he doesn't learn his lessons carefully
-unless

TYPE 2
1. unless the studied harder, he would fail the final exam
- if
2. unless the drank alcohol, he would pass the contest
- if
3. unless he phoned immediately, he wouldn't meet Mary
-if
4/ if we didn't have a calculator, we couldn't work his more quickly
-unless
5. if i weren't weak, i could walk
- unless
6. if you weren't slow now, you could uiwn the race
- unless
7. if you didn't speak very quickly, the students could hear you well
- unless
8. if tom didn't invite me, i wouldn't go to the party
- unless
9. if they didn;t know his number now, they wouldn't give it to me
- unless
10. unless he were careful, he would have serious accident
- if

TYPE3
1. if he hadn;t been too lazy, he wouldn't have failed the exam
- unless
2. unless yesterday had been a nice day, we wouldn;t have gone camping
-if
3. if you hadn't driven carefully, you would have had a serious accident
- unless
4. if the bus hadn't been crowded, he wouldn't have walked to the office
-unless
5. unless you had studied hard, you wouldn't have walked to the office
- if
6. unless you had helped me, i wouldn't have finished our homework
- if
7. unless the meeting were so long they wouldn't feel tired
- if
8. if he weren't too lazy, he would pass the exam
- unless

5
15 tháng 1 2018

REWRITE THE FOLLOWING SENTENCES USING IF-> UNLESS
TYPE1
1. If he doesn't hurry, he will be late for school
-> unless he hurry, he will be late for school
2. unless it stops raining, we won't go out
-> if it doesn't stop raining, we won't go out
3. you will get success if you are patient
- unless you aren't patient,you will get success
4. those flowers will die if nobody waters them
- unless nobody doesn't water them,those flowers will die
5. no one can help him if he doesn't tell the truth
- unless he tell the truth,no one can help him
6. you will catch a cold unless you keep your feet dry
- if you don't keep your feet dry,you won't catch a cold
7. if i don't catch the plane, i will not be home by five
- unless i catch the plane, i will not be home by five
8. if you don't apologize, i will never speak to you again
-unless you apologize, i will never speak to you again
9. unless he gives me his number, i won't phone him
- if he doesn't give me his number, i won't phone him
10. he cannot do that exercise if he doesn't learn his lessons carefully
-unless he learn his lessons carefully,he can do that exercise

15 tháng 1 2018

TYPE 2
1. unless the studied harder, he would fail the final exam
- if the didn't study harder, he would fail the final exam
2. unless the drank alcohol, he would pass the contest
- if the didn't drink alcohol, he would pass the contest
3. unless he phoned immediately, he wouldn't meet Mary
-if he didn't phone immediately, he wouldn't meet Mary
4/ if we didn't have a calculator, we couldn't work his more quickly
-unless we didn't have a calculator, we couldn't work his more quickly
5. if i weren't weak, i could walk
- unless i were weak, i could walk
6. if you weren't slow now, you could uiwn the race
- unless you were slow now, you could uiwn the race
7. if you didn't speak very quickly, the students could hear you well
- unless you spoke very quickly, the students could hear you well
8. if tom didn't invite me, i wouldn't go to the party
- unless tom invited me, i wouldn't go to the party
9. if they didn;t know his number now, they wouldn't give it to me
- unless they knew his number now, they wouldn't give it to me
10. unless he were careful, he would have serious accident
- if he weren't careful, he would have serious accident

Ex 1: Cho dạng đúng của động từ trong ngoặc ( câu ĐK loại 1) 1. If I have time, I ......................(send) you an e-mail every day 2. I will go with you if I ...................(finish) my work early 3. If you...................(be) careful, you.........................(not/ break) the vase 4. If we...........................(not/ hurry), we..................(miss) the bus 5. If you.....................(speak) quickly, I...................................(not/...
Đọc tiếp

Ex 1: Cho dạng đúng của động từ trong ngoặc ( câu ĐK loại 1)

1. If I have time, I ......................(send) you an e-mail every day

2. I will go with you if I ...................(finish) my work early

3. If you...................(be) careful, you.........................(not/ break) the vase

4. If we...........................(not/ hurry), we..................(miss) the bus

5. If you.....................(speak) quickly, I...................................(not/ understand) you

6. What................(you/ do) if you can get their help

7. We....................(play) volleyball if it....................(not/rain) this afternoon

8. If he ........................(spend) more time doing his homework, he....................(do) his tests better

Ex 2: Cho dạng đúng của động từ trong ngoặc ( câu ĐK loại 2)

1. He doesn't have a car. If he....................(have) a car, he...........................(drive) to work

2. If I.....................(live) by the sea, I......................(go) swimming every day

3. If I ........................(be) a teacher, I ........................(not/ give) my students too much homework

4. What....................(you/do) is you............................(have) one million dollars

5. Lan........................(go) with you if she.................(like) rock music

6. Jonh isn't here now. If he.....................(be) here, he..................(help) us

7. If he................(can) use a computer, he................(work) more effectively

8. Where.......................(you/live) if you.......................(can) choose?

Ex 3: Cho dạng đúng của động từ trong ngoặc ( câu ĐK loại 1 or 2)

1. If she were intelligent, she..........................(can) answer that question

2. I'll do it if he ...............(ask) me

3. If it .........................(rain) tomorrow, we'll canced the trip

4. If she.........................(speak) more clearly, I could understand her

5. If you got more exercise, you.........................(feel) better

6. Would you mind if I ................... (use) your phone

7. I won't help you if you..................(not/ try) harder

8. If people keep their environment clean, they...........................(live) a healthy life

9. I don't have a car. If I .................(have) one, I................(lend) it to you

10. If it.................(stop) raining, we could go out

Ex 4: Rewrite the following sentences, using the words provieded

1. Be careful or you will drop the plates

--> If you..........................................................................

2. Tell me the truth or I won't help you

--> If you.............................................................................

3. Hurry or you'll come to class late

--> If you.............................................................................

4. Listen carefully or you won't understand the lesson

--> If you..............................................................................

5. I don't know the anseer, so I can't tell you

--> If I........................................................................................

6. She is ill, so she can't come to class today

--> If she....................................................................................

7. The book is too expensive, so I won't buy it

--> If the book...........................................................................

8. I can't open the door because I don't have the key

--> If I...................................................................................

9. We can't go to the beach because it is rainning now

--> If it..................................................................................

10. The bike is broken, so I have to walk to school

--> If the bike........................................................................

2
2 tháng 7 2018

Ex 1: Cho dạng đúng của động từ trong ngoặc ( câu ĐK loại 1)

1. If I have time, I will send(send) you an e-mail every day

2. I will go with you if I ..........finish.........(finish) my work early

3. If you........are...........(be) careful, you.............won't break............(not/ break) the vase

4. If we............don't hurry...............(not/ hurry), we........will miss..........(miss) the bus

5. If you...........speak..........(speak) quickly, I.....................won't understand..............(not/ understand) you

6. What.........will you do.......(you/ do) if you can get their help

7. We..........will paly..........(play) volleyball if it...........doesn't rain.........(not/rain) this afternoon

8. If he .............spends...........(spend) more time doing his homework, he.........will đo...........(do) his tests better

Ex 2: Cho dạng đúng của động từ trong ngoặc ( câu ĐK loại 2)

1. He doesn't have a car. If he........had............(have) a car, he................would drive...........(drive) to work

2. If I.........lived............(live) by the sea, I............would go..........(go) swimming every day

3. If I ............was............(be) a teacher, I .........wouldn't give...............(not/ give) my students too much homework

4. What........would you do............(you/do) is you..............had..............(have) one million dollars

5. Lan..........would go..............(go) with you if she.........liked........(like) rock music

6. Jonh isn't here now. If he..........was...........(be) here, he.........would help.........(help) us

7. If he...........could.....(can) use a computer, he.........would work.......(work) more effectively

8. Where...............would you live.......(you/live) if you.......could................(can) choose?

2 tháng 7 2018

Ex 3: Cho dạng đúng của động từ trong ngoặc ( câu ĐK loại 1 or 2)

1. If she were intelligent, she could (can) answer that question

2. I'll do it if he asks(ask) me

3. If it rains(rain) tomorrow, we'll canced the trip

4. If she spoke (speak) more clearly, I could understand her

5. If you got more exercise, you would feel (feel) better

6. Would you mind if I used (use) your phone

7. I won't help you if you don't try(not/ try) harder

8. If people keep their environment clean, they will live(live) a healthy life

9. I don't have a car. If I had(have) one, I would lend (lend) it to you

10. If it.......stoped..........(stop) raining, we could go out

Ex 4: Rewrite the following sentences, using the words provieded

1. Be careful or you will drop the plates

--> If you aren't careful, you will drop the plates

2. Tell me the truth or I won't help you

--> If you don't tell me the truth, I won't help you

3. Hurry or you'll come to class late

--> If you hurry up, you will come to class on time

4. Listen carefully or you won't understand the lesson

--> If you don't listen carefully, you won't understand the lesson

5. I don't know the answer, so I can't tell you

--> If I knew the answer, I would tell you

6. She is ill, so she can't come to class today

--> If she wasn't ill, she could come to class today

7. The book is too expensive, so I won't buy it

--> If the book was cheaper, I would buy it

8. I can't open the door because I don't have the key

--> If I had a key, I could open the door

9. We can't go to the beach because it is rainning now

--> If it wasn't raining, we could go to the beach now

10. The bike is broken, so I have to walk to school

--> If the bike wasn't broken, I would ride to school

27 tháng 7 2019

4. If she had written slowly

5. Would have been able to

6. Working, he would have had enough money now

7. If you had told

8. Eat too much,

9. It hadn't rained

10. Get dressed right away

27 tháng 7 2019

4. she wrote very fast and as a result made a lot of mistakes (slowly)

➜if she ....had written slowly..................she wouldn't have made so many mistakes

5.owing to technical difficulties the plane was not able to take off.(able)

➜if there hadn't been technical difficulties, the plane ...would have been able to.........take off

6. he hasn't got enough money now because he didn't save when he was working. (would)

➜if he had saved when he was ...working, he would have had enough........ money now

7. it's just as well you told me or i might have married him (you )

➜i might have married him ..........me( Câu này k chắc...)

8. eating too much makes you fat (eat)

➜ if you ...eat too much, that will make...............you fat

9. we couldn't play tennis yesterday because of the rain. (rained)

➜if...it hadn't rained........................would've been able to play tenniss yesterday

10. if you don't get dressed right away we'll go without you. (put)

➜unless...you put on...............right away we'll go without you

12 tháng 5 2020

1. Because they drive carelessly, they get some problems
-> If_______they didn't drive carelessly, they wouldn't get some problems____________
2. Keep quiet or I'll scream.
-> If _________you don't keep quiet, I'll scream___________
3. We don't have enough money, so we don't buy those new comics
-> If __________we had enough money, we would buy those new comics___________
4. Stop talking or you won't understand the lesson
-> If ___________you odn't stop talking, you won't understand the lesson___________
5. She is not free today, that's why she can't go to the movie with her friend
-> If__________she were free today, she could go to the movie with her friend______________
6. Water these plants or they will die.
-> If____________you don't water these plants, they'll die______________
7. He is so lazy, so he fails in the final exam
-> If ______________he weren't so lazy, he wouldn't fail in the final exam_____________
8. Because the weather is not fine, the children don't play out door
-> If ________________the weather were fine, the children would play out door______________
9. Go right now or you'll be late for the train
-> If ____________you don't go right now, you'll be late for the train_________________
10. She doesn't play tennis because she is very old
-> If____________she weren't very old, she would play tennis_____________

Rewrite the following sentences 1. He smokes too much; that's why he can't get rid of his cough.->Were...................... 2.He doesn't take any execises. He is so unhealthy->Were............................. 3.We can't get the ticket because I don't have the right change.->Were..................... 4.Study hard or you won't pass the exam.-> Should......................... 5.Don't be impatient or you will make mistakes.->Should.................. 6.I didn't eat lunch, I feel hungry...
Đọc tiếp

Rewrite the following sentences

1. He smokes too much; that's why he can't get rid of his cough.->Were......................

2.He doesn't take any execises. He is so unhealthy->Were.............................

3.We can't get the ticket because I don't have the right change.->Were.....................

4.Study hard or you won't pass the exam.-> Should.........................

5.Don't be impatient or you will make mistakes.->Should..................

6.I didn't eat lunch, I feel hungry now.->Had.....................

7.I only come if they invite me.->Unless..........

8.He didn't revise all his lesson, he failed the exam.->Had...........................

9. The park is over there, only 5 minutes walk.->If you walk.......................

10.Leave me alone or I'll call the police.->Unless..................

11.The car breaks down so often because you don't take good care of it.->Were you.................

12.He is very bad-tempered, that's why his wife left him soon after marriage.->If........................

13.Don't tell lies to your boss or you'll be fired at once.-Should..............

14.She got married at such an early age: otherwise, she would be at unisersity now.-> Had...........................

0
Rewrite the following sentences 1. He smokes too much; that's why he can't get rid of his cough.->Were...................... 2.He doesn't take any execises. He is so unhealthy->Were............................. 3.We can't get the ticket because I don't have the right change.->Were..................... 4.Study hard or you won't pass the exam.-> Should......................... 5.Don't be impatient or you will make mistakes.->Should.................. 6.I didn't eat lunch, I feel hungry...
Đọc tiếp

Rewrite the following sentences

1. He smokes too much; that's why he can't get rid of his cough.->Were......................

2.He doesn't take any execises. He is so unhealthy->Were.............................

3.We can't get the ticket because I don't have the right change.->Were.....................

4.Study hard or you won't pass the exam.-> Should.........................

5.Don't be impatient or you will make mistakes.->Should..................

6.I didn't eat lunch, I feel hungry now.->Had.....................

7.I only come if they invite me.->Unless..........

8.He didn't revise all his lesson, he failed the exam.->Had...........................

9. The park is over there, only 5 minutes walk.->If you walk.......................

10.Leave me alone or I'll call the police.->Unless..................

11.The car breaks down so often because you don't take good care of it.->Were you.................

12.He is very bad-tempered, that's why his wife left him soon after marriage.->If........................

13.Don't tell lies to your boss or you'll be fired at once.-Should..............

14.She got married at such an early age: otherwise, she would be at unisersity now.-> Had...........................

2
14 tháng 8 2019

Rewrite the following sentences

1. He smokes too much; that's why he can't get rid of his cough.

->Were he not to smoke too much, he could get rid of his cough.

2.He doesn't take any exercises. He is so unhealthy

->Were he to take some exercise, we would be so healthy.

3.We can't get the ticket because I don't have the right change.

->Were I to have the right change, we could get the ticket.

4.Study hard or you won't pass the exam.

-> Should you study hard, you will pass the exam.

5.Don't be impatient or you will make mistakes.

->Should you be impatient, you will make mistakes.

6.I didn't eat lunch, I feel hungry now.

->Had I eaten lunch, I wouldn't feel hungry now.

7.I only come if they invite me.

->Unless they invite me, I won't come.

8.He didn't revise all his lesson, he failed the exam.

->Had he revised all his lesson, he wouldn't have failed the exam.

9. The park is over there, only 5 minutes walk.

->If you walk to the park, it will take you 5 minutes.

10.Leave me alone or I'll call the police.

->Unless you leave me alone, I'll call the police.

11.The car breaks down so often because you don't take good care of it.

->Were you to take good care of the car, it wouldn't break down so often.

12.He is very bad-tempered, that's why his wife left him soon after marriage.

->If he were not very bad-tempered, his wife wouldn't have left him soon after marriage.

13.Don't tell lies to your boss or you'll be fired at once.

->Should you tell lies to your boss, you'll be fired at once.

14.She got married at such an early age: otherwise, she would be at unisersity now.

-> Had she not got married at such an early age, she would have been at unisersity now.

14 tháng 8 2019

1. He smokes too much; that's why he can't get rid of his cough.

-> Were he not to smoke too much, he couldn't get rid of his cough.

2.He doesn't take any execises. He is so unhealthy

-> Were he to take any execises, he wouldn't be so unhealthy.

3.We can't get the ticket because I don't have the right change.

-> Were I to have the right change, we couldn't get the ticket.

4.Study hard or you won't pass the exam.

-> Should you hard study, you will pass the exam.

5.Don't be impatient or you will make mistakes.

-> Should you be impatient, you won't make mistakes.

6.I didn't eat lunch, I feel hungry now.

-> Had I eaten lunch, I wouldn't feel hungry now.

7.I only come if they invite me.

-> Unless they invite me, I won't come.

8.He didn't revise all his lesson, he failed the exam.

-> Had he revised all his lesson, he woulfn't have failed the exam.

9. The park is over there, only 5 minutes walk.

-> If you walk to the park, it will take you only 5 minutes.

10.Leave me alone or I'll call the police.

-> Unless you leave me alone, I'll call the police.

11.The car breaks down so often because you don't take good care of it.

-> Were you to take good care of the car, it wouldn't break down so often.

12.He is very bad-tempered, that's why his wife left him soon after marriage.

-> If he wasn't very bad-tempered, his wife wouldn't have left him soon after marriage.

13.Don't tell lies to your boss or you'll be fired at once.

-> Should you tell lies to your boss, you'll be fired at once.

14.She got married at such an early age: otherwise, she would be at unisersity now.

-> Had she not got married at such an early age, she would be at unisersity now.

Ex: Rewriting 1 I'm busy so i can't go out with my friends ➞ If 2 He plays soccer well so he can take part in the Games ➞ If 3 She can't go to the party because i don't invite her ➞ If 4 I can't get a job easily because I don't have a degree ➞ If 5 He doesn't have enough money , so he doesn't buy a house ➞ If 6 It is raining heavily so we can't go to the market ➞ If 7 He will go to watch the World Cup because he is studying in Russi ➞ If 8 I didn't talk to him because i...
Đọc tiếp

Ex: Rewriting

1 I'm busy so i can't go out with my friends ➞ If

2 He plays soccer well so he can take part in the Games ➞ If

3 She can't go to the party because i don't invite her ➞ If

4 I can't get a job easily because I don't have a degree ➞ If

5 He doesn't have enough money , so he doesn't buy a house ➞ If

6 It is raining heavily so we can't go to the market ➞ If

7 He will go to watch the World Cup because he is studying in Russi ➞ If

8 I didn't talk to him because i didn't know him ➞ If

9 John didn't have money so he couldn't lend you some ➞ If

10 We couldn't go out because the weather was so bad ➞If

11 Mary didn't wear the raincoat, so she got a cold ➞If

12 Marry was injured in the crash because she wasnot wearing the seat belt ➞ If

13 Carol didn't answer the phone because he was studying ➞ If

14 You didn't eat breakfast, so you are hungry now➞If

15 I stayed up late last night, so i feel asleep now ➞If

16 I can't retell the film now because i didn't wlatch it last night ➞If

17 He is tired now because he drank too much yesterday evening➞If

18 I bought the car yesterday, so I run out of money nơ➝ If

19 He didn't go to the class regularly, so he can't take part in the competition now➞If

Mn giúp mình vs ạ

0
6 tháng 2 2018

REVIEW
11. Paulo works on two jobs, so he doesn't have time to help you with your remodeling
->were Paulo not to work on two jobs, he would have time to help you with your remodeling
12. Jack was late to the meeting because his watch was slow
-> jack would not have been late to the meeting if his watch hadn't been slow

13. we can't easily get access to the internet because we don't live in a big city
-> unless we lived in a big city, we couldn't easily get access to the internet
14. you should give up smoking
-> if i were you, i didn't smoke
15. i used my calculator; otherwise i'd have taken longer
-> had I not used my calculator, I would have taken longer

16. if i weren't i my 70s and rather unfit, i might consider talking up squash
-> were i in my 70s and rather unfit i might consider talking up squash
17. do more exercises or you will get fat
-> if you don't do more exercise, you will get fat
18. to day isn't sunday, that's why pupils can't go swimming
-> if today were sunday, pupils could go swimming
19. i don't have a spare ticket so i can't take you to the concert
-> if i had a spare ticket, i could take you to the concert
20. they don't understand the problem; therefore, they won't find a solution
-> if they understood the problem, they would find a solution