1. She doesn't live in London because she doesn't know anyone there. =>She'd live in London if she knew someone there.
2. I can't live in the country because I can't find a job there.
=> I'd live in the country if I could find a job there.
3. I don't have a spare ticket. I can't take you to the concert.
=> If I had a spare ticket, I could take you to the concert
4. The schoolchildren sowed some seeds, but they forgot to water them so they didn't grow.
=> If the children had watered some seeds, they would have grown
5. They don't understand the problem. They won't find a solution.
=> If they understood the problem, they would find a solution
6. He sits around too much. He isn't fit.
=> If he were fit, he wouldn't sit around too much
7. Carol didn't answer the phone because she was studying.
=> If Carol hadn't been studying, he would have answered the phone.
8. Rita is exhausted today because she didn't get any sleep last night.
=> If Rita had slept last night, she wouldn't be exhausted today (if mix)
9. She's very thin; perhaps that's why she feels cold so much.
=> If she weren't very thin, she wouldn't feel cold so much. (có thể sử dụng wasn't)
10. He never polishes his shoes, so he never looks smart.
=> If he polished his shoes, he would look smart.

Giải thích giúp mình với nhé. 

1. She’d live in London if she knew someone there.

V. Complete each of the following sentences so that it means the same as the sentence before

1. She doesn’t live in London because she doesn’t know anyone there

→ She’d live in London if she knew someone there

2. I can’t live in the country because I can’t find a job there

→ I’d live in the country if I could find a job there.

3. I don’t have a spare ticket. I can’t take you to the concert

→ If I had a spare ticket, I would take you to the concert.

4. The schoolchildren sowed some seeds, but they forgot to water them so they didn’t grow.

→ If they had watered the seeds, they would have grown.

5. They don’t understand the problem. They won’t find a solution

→ If they understood the problem, they would find a solution.

6. He sits around too much. He isn’t fit.

→ If he didn't sit around so much, he would be fitter.

7. Carol didn’t answer the phone because she was studying..

→ If Carol wasn't studying, she would have answered the phone.

8. Rita is exhausted today because she didn’t get any sleep last night.

→ If Rita had gotten some sleep last night, she wouldn't be exhausted today.

9. She’s very thin; perhaps that’s why she feels cold so much.

→ If she wasn't so thin, she wouldn't feel cold so much.

10. He never polishes his shoes, so he never looks smart

→ If he polished his shoes, he would look smart.

11. He can’t park near his office; that’s why he doesn’t come by car

→ If he could park near his office, he would come by car.

12. My house is guarded by two big dogs. That’s the only reason it isn’t broken into every night

→ If my house didn't have two big dogs guarding it, it would be broken into every night.

13. The flats are not clearly numbered, so it is very difficult to find anyone.

→ If the flats were clearly numbered, it would be easier to find anyone.

14. I don’t know her e-mail address, so I can’t tell you

→ If I knew her email address, I could tell you.

15. She works in the evening. She has no time to play with her children

→ If she didn't work in the evening, she would have time to play with her children.

16. I don’t want them to be upset, so I’ve decided not to tell them what happened.

→ They would be upset if I told them what happened.

17. I am not tall enough to join the basketball tea

→ If I were tall enough, I could join the basketball team.

18. He doesn’t see the signal so he doesn’t stop his car

→ If he saw the signal, he would stop his car.

19. Peter gets bad marks because he doesn’t prepare his lessons well

→ If Peter prepared his lessons well, he would get better marks.

20. Mary doesn’t have enough money. She can’t buy a new car.

→ If Mary had enough money, she could buy a new car.

21. Go right now or you’ll be late for the train.

→ If you don't go now, you'll be late for the train.

22. He doesn’t apply for the job because he doesn’t have enough qualifications.

→ If he had enough qualifications, he would apply for the job.

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

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

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

→ If you  talked to them more often, they would understand you.

25. Because you speak English unnaturally, they do not understand you.

→ If you spoke English more naturally, they would understand you.

1. She would live in London if she knew somebody there

2. I'd live in the country if I could find a job there

3. If I had a spare ticket, I could take you to the concert

4. If the schoolchildren had remembered to water some seeds, they would have grown.

5. If they didn't understand the problem, they wouldn't find a solution

6. If he didn't sit around too much, he would be fit

7. If Carol had not been studying, she would have answered the phone

CHÚC BẠN HỌC TỐT!!!

1. She doesn’t live in London because she doesn’t know anyone there

She’d live in London if she knew someone there.

2. I can’t live in the country because I can’t find a job there

I’d live in the country if i could find a job there 

3. I don’t have a spare ticket. I can’t take you to the concert

If I had a spare ticket, I would take you to the concert.

4. The schoolchildren sowed some seeds, but they forgot to water them so they didn’t grow.

If the children had remembered to water some seeds, they would have grown.

5. They don’t understand the problem. They won’t find a solution

If they understood the problem, they would find a solution.

6. He sits around too much. He isn’t fit.

If he didn't sit around too much, he would be fit.

7. Carol didn’t answer the phone because she was studying.

If Carol had been free, she would have answered the phone.

1. She doesn’t live in London because she doesn’t know anyone there

=> If ……………………………… she knew someone there, she would lived in London……………………………….

2. I don’t have a spare ticket. I can’t take you to the concert

=> If I ………………… had a square ticket,i could take you to the concert……………………………………………...

3. They don’t understand the problem. They won’t find a solution

=> If they ………………………  understood the problem, they would find a solution …………………………………….

4. Carol didn’t answer the phone because she was studying..

=> If Carol …………………………  hadn’t been studying,she would have answered the phone…………………………

5. Rita is exhausted today because she didn’t get any sleep last night

.=> If Rita …………………………… had got sleep last night,she wouldn’t be exhausted today…………………………

1, If she knew anyone there, she would live in London
2, If I had a spare ticket, I could take you to the concert
3, If they understanded the problem, they would find a solution
4, If Carol had 't study, she would have answered the phone
5,  If Rita had gotten any sleep last night , she would have  exhausted today

I>Rewrite the folowing sentences,using the 2^nd

EX:Lan is lazy.She doesn't get hight marks.

If Lan werren't lazy,she would get high marks.

1.We don't visir you every often because you live so far away.

=If you didn't  live so far away.,we would visir you every often 

2.He coughs a lot of mokes forty cigarettes a day.

=IF he didn't smoke forty cigarettes a day,he wouldn't cough.

3.It's rainning,so we can't have dinner in the garden.

=if It weren't rainning, we could have dinner in the garden.

4.I can't get in because I haven't got a keys

=If I had got a keys ,I could get in

1. I would be surprised if Ann came to see us now.

2. If we had enough money,we would go on holiday

3. Unless you do these exercises more carefully, you will fail the exam.

4. If I knew the answer, I could tell you.

5. If she knew French, she could apply for the job

6. Unless she cam here now, we'd come back home

7. Unless you are careful, you will be able to get the job

8. If it rains soon, the tree won't die

* Rewrite the sentences.

1. It is late now; I don't think Ann will come to see us.

-> I would be surprised if __________Ann came to see us________.

2. We don't go on holiday because we don't have enough money.

-> If _________we had enough money, we would go on holiday_________.

3. Do these exercises more carefully or you will fail the exams.

->Unless_________you do these exercises more carefully, you will fail the exams_________.

4. I do not know the answer so I cannot tell you.

-> If _________I knew the answer, I could tell you_________.

5. She can't apply for the job because she doesn't know Frencj.

-> If she knew__________Frencj, she could apply for the job________.

6. If she didn't come here now, we'd come back home.

-> Unless__________she came here now, we'd come back home________.

7. Be careful or you will not be able to get the job.

-> Unless__________you are careful, you won't be able to get the job________.

8. The trees will die unless it rains soon.

-> If_________it doesn't rain soon, the trees will die_________.

REVIEW

35. He doesn't apply for thr job because he doesn't have enough qualification

-> if he had enough qualification.he would apply for thr job

36. Hurry up or we will be late for the exam

-> if we don't Hurry up ,we will be late for the exam

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

-> unless you often talk to them,They do not understand you

28. I don't know her email address so i can't tell you

->if i knew her email address sI could tell you

29. She doesn't live in london because she doesn't know anyone there

-> she would know someone there if She lived in london

30. I couldn't live in the country because i couldn't find a job here

->i could live in the country if i could find a job here

31. She had no time to play with her children because she worked in the evening

-> if she hadn't worked in the evening,she would have had time to play with her children

32. He doesn't see the signal so he doesn't stop his car

-> if he saw the signal ,he wouldt stop his car

33. Marry doesn't have enough money so she can't buy a new car

-> marry could buy a new car if she had enough money

34. Prepare the lesson well or you won't understand it

-if you don't Prepare the lesson well ,you won't understand it

REVIEW

35. He doesn't apply for thr job because he doesn't have enough qualification

-> if he had enough qualification.he would apply for thr job

36. Hurry up or we will be late for the exam

-> if we don't Hurry up ,we will be late for the exam

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

-> unless you often talk to them,They do not understand you

28. I don't know her email address so i can't tell you

->if i knew her email address sI could tell you

29. She doesn't live in london because she doesn't know anyone there

-> she would know someone there if She lived in london

30. I couldn't live in the country because i couldn't find a job here

->i could live in the country if i could find a job here

31. She had no time to play with her children because she worked in the evening

-> if she hadn't worked in the evening,she would have had time to play with her children

32. He doesn't see the signal so he doesn't stop his car

-> if he saw the signal ,he wouldt stop his car

33. Marry doesn't have enough money so she can't buy a new car

-> marry could buy a new car if she had enough money

34. Prepare the lesson well or you won't understand it

-if you don't Prepare the lesson well ,you won't understand it

1: we didn't visit the museum because we didn't have time.

---> If we had had time, we would have visited the museum.

2: she got tired because she worked so hard.

---> If she hadn't worked so hard, she wouldn't have gotten tired.

3: he didn't pass the exam because he didn't work hard

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

4: they didn't attend the lectuer, so they were punished

----> If they had attended the lecture, they wouldn't have been punished.

5: I didn't have an unbrella with me so I got wet.

----> I wouldn't have gotten wet if I had had an umbrella.

6: you drink too much coffee , that's why you can't sleep

-----> If you didn't drink too much coffee, you could sleep.

7:dick is in prison because a detective recognized him.

----> If a detective hadn't recognized Dick, he wouldn't be in prison.

8: I don't have any money , so I can't lend you any .

---> If I had some money, I could lend you some.

9: I didn't have the money , so I didn't buy a new suit.

----> If I had had the money, I would have bought a new suit.

10: she doesn't live in london because she doesn't know anyone there.

----> If she knew someone in London, she would live there.

11: I can't live in the country because I don't find a job there .

---->If I found a job in the country, I could live here