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Câu b:
- Gọi 3 số cần tìm là: a-2 ; a ; a+2
- Theo bài ra ta có:
- \(\left(a+2\right)^2-a\left(a-2\right)=334\\ \Leftrightarrow a^2+4a+4-a^2+2a=334\\ \Leftrightarrow6a=330\\ \Leftrightarrow a=55\)
- Vậy 3 số cần tìm là 53 ; 55 ; 57
I. Error identification & correct (xác định và sửa lỗi sai)
Example: It’s difficult getting there on time in rush hour.
getting → to get
1. He does his homework at the moment. -> is doing
2. He is learning cooking at the moment. -> to cook
3. What do you usually do at your free time? -> in
4. You should practise speak English before you go to England. -> speaking
5. She is very good of writing essays. -> at
6. I am really not interested of going to high school. -> in
7. He thanks her about inviting him to the party. -> for
8. They don’t go to the swimming pool because the rain. -> because of
9. They don’t go to the swimming pool because the rain. -> because of
10. Would you like going to a pop concert this weekend. -> to go
II. Complete the sentences with although/ in spite of/ because/ because of.
1. because the meeting's at 2.00, I won't be able to see you.
2. although I told the absolute truth, no one would believe me.
3. The goods were never delivered in spite of the promise we had received.
4. My mother is always complaining because of the untidiness of my room.
5. I didn't get the job although I had all the necessary qualifications.
6. It's unsafe to travel in that country because of the ongoing civil war.
7. The villagers refused to leave in spite of the drought.
8. because everything looked different, I had no idea where to go.
9. because of his age, John was not hired although he had the necessary
qualifications.
10. You can't enter this secure area because you don't have an official permit.
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
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
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.
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.
câu điều kiện
1. If I had a tpyewwriter, I ( type) .....WOULD TYPE...it myself
2. If I (Know)......KNEW..his address, I'd give it to you
3. more tourists would come to this country if it ( have).HAD...a better climate
4. If I ( win) ...WON. a big prize in a lottery, I'd give up my job
5. I ( tell).WOULD TELL...you what this means if I knew Greek
6. If he had prepared for the interview, he(get) ..WOULD GET.the job
7. if my father had earned much money, life (be)....WOULD BE.easy for us
8.if I had taken my umbrella, I ( not get)..WOULDN'T HAVE GOT..wet
9. If you (phoned)...HAD PHONED....me yesterday WOULD I ( give).HAVE GIVEN....you the great new ? (nếu đc hãy giải thích rõ câu này giúp em vs ạ )
10. if robert ( not start).....DIDN'T START...smoking cigarettes, he would not have got a bad cough
câu điều kiện
1. If I had a tpyewwriter, I ( type) ..would type......it myself
2. If I (Know)....knew....his address, I'd give it to you
3. more tourists would come to this country if it ( have)..had...a better climate
4. If I ( win) ..won.. a big prize in a lottery, I'd give up my job
5. I ( tell)..would tell..you what this means if I knew Greek
6. If he had prepared for the interview, he(get) ..would have got..the job
7. if my father had earned much money, life (be)...would have been...easy for us
8.if I had taken my umbrella, I ( not get)..wouldn't have got..wet
9. If you (phoned)...had phoned....me yesterday ,would I ( give).. have given..you the great new ?
10. if robert ( not start)....hadn't started....smoking cigarettes, he would not have got a bad cough
EX : Complete each of the following sentences in such a way that it means the same as the sentence printed before it.
1/ we didn't know your phone number ,so we could not contact you
If we had known your phone number, we could have contacted you
2/ Because Simon doesn't live near his mother,he can't visit her often
If Simon lived near his mother, he could visit her often.
3/ she didn't hurry , so she missed the train
If she had hurried, she would have caught the train.
6/ John is fat because he eats so many chips
If John didn't eat so many chips, he wouldn't be fat.
7/ Bill never does anything if you don't tell him what to do.
-> Unless................... you tell Tom what to do, he will never do anything.........................................
8/ They don't have enough time so they cannot do me a favour.
If they had enough time, they could do me a favor.
9/we did not visit the museum because we had no time .
If we had had time, we would have visited the museum.
10/ we can't buy this car because it is very expensive
This car is too expensive for me to buy.
11/ Susan felf sick because he ate 4 cream cakes
If Susan hadn’t ate 4 cream cakes, he wouldn’t have felt sick
EX : Complete each of the following sentences in such a way that it means the same as the sentence printed before it.
1/ we didn't know your phone number ,so we could not contact you
=> If we had known your phone number , we would have contacted you
2/ Because Simon doesn't live near his mother,he can't visit her often
=> If Simon lived near his mother , he could visit her often
3/ she didn't hurry , so she missed the train
=> If she had hurried , she wouldn't have missed the train
6/ John is fat because he eats so many chips
=> If John didn't eat so many chips , he wouldn't be fat
7/ Bill never does anything if you don't tell him what to do.
-> Unless....Bill never does anything , you tell him what to do ........
8/ They don't have enough time so they cannot do me a favour.
=> If they had enough time , they could do me a favour
9/we did not visit the museum because we had no time
=> If we had had time , we would have visited the museum
10/ we can't buy this car because it is very expensive
=> If it weren't very expensive , we could buy this car
11/ Susan felf sick because he ate 4 cream cakes.
=> If Susan hadn't eaten 4 cream cakes , he wouldn't have felt sick
1 must
2should
3can
4must
5 had
6might
7should
8had
9 could
10 need/would
11 can
12 would
13 might/could/may
14 should
15 need
Complete the text with one suitable modal verb in each space :
Some people always have good advice to give you, but only after the event. You (1).....must..... have come across the type, who somehow always know what you (2)....should....... have done when it has become too late. By now I (3).....can..... spot them a mile off. It (4).....must....... be because I have had so much practice. Last week, for example, I (5)......had...... to take my car to the garage because the lights weren't working. It was an expensive job, but I decided that I (6).....might...... as well pay, and get it over quickly. "You (7).........should..... have told me", said a friend when I was telling him how much I (8).......had....... to pay. "I (9)......could...... easily have fixed it for you. Then you (10).......need ........ not have wasted so much money." You (11)......can......... imagine how I felt ! Actually, he (12)........would ......... probably have made a mess of the job, and I (13).......might/ could........ well have ended up paying more. But it does seem strange that everyone else (14)......should.......... know exactly what I (15)........need/ought..... to do.
Ex 1:
1) would type 2) knew 3) would look 4) played 5) wouldn't make
6) were 7) had 8) Would you visit 9) gave 10) would buy
Ex 2:
1) If they weren't poor, they could help us.
2) If he did his homework, he wouldn't be punished.
3) If he had enough time, he could help me.
4) If she took exercises, she wouldn't be overweight.
5) He wouldn't go to class late if he had a bicycle.
6) I could do my homework if I weren't bad at English.
7) If he practised speaking French, he would speak it fluently.
8) If it didn't snow heavily, the meeting wouldn't be cancelled.
9) If it isn't rain, we will go.
10) If John didn't eat so many chips, he wouldn't be fat.
6 enlarged
7 suspiciously
8 unqualified
9 irresponsible
10 digestive
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