3. If the weather is not fine, we'll stay at home.

4. If I don't get my work finished, I can't go with you.

5. Unless you leave on the 15th, you'll get home late for your mother's party.

6. If Tom's father doesn't tell him what to do, he never does anything.

3 the weather isn't fine, we'll stay at home.

4  I don't get my work finished, I can't go with you.

5 you leave on the 15^th, you'll  get home late for your mother's party.

6 Tom's father doesn't tell him what to do,  he never does anything.

I. Rewrite the sentences，beginning as shown：

1. They don't have enough time so they cannot do me a favour.

If they had enough time, they could do me a favour.

2.I can't send you a postcard if you don't give me your address.

Unless you give me your address, I can't send you a postcard.

3. He lost his savings because he wasn't careful.

If he had been careful, he wouldn't have lost his savings.

4. If he were not so lazy，he would be more successful.

Were he not to be so lazy, he would be more successful.

5. If you had finished your work，you would have been awarded

Had you finished your work, you would have been awarded.

6. Bill never does anything unless you tell him what to do.

If you don't tell Bill what to do, he never does anything.

A Conditional sentences type 1 (Câu điều kiện loại 1)

1. I can't see anything without my glasses, If I don't have my glasses, I can't see anything

2. Only when you tell him will he perfect his duties. If you tell him, he will perfect his duties 

3.We can't be successful without Peter's ideas. Unless we have Peter's ideas, we can't be succesful

4. You can't go shopping unless you have money. If you don't have money, you can't go shopping

5. Unless you watch TV every day, you won't know much new news. If you don't watch TV every day, you won't know much new news

6. If the work is finished by lunch time, you can meet me. Should the work can be finishes by lunch time, you can meet me

7. Unless it rains soon, we will lack water. If it doesn't rain soon, we will lack water

8. I'm willing to help you when you need me. Should you need me, I will be willing to help you

9. I can't see you tomorrow. I have to visit my mother. If I have to visit my mother, I can't see you tomorrow 

I 10. I can't let you go because you don't have your own identification. If you don't have your own indetification, I can't let you go 

I. Choose the best answer to complete the following sentences.

1. If Peter .........., Sarah will be sad because she wants to meet him very much

a. comes b. do not come c. does not come d. will come

2. If his teeth still ........, he will have to go to the dentist’s again.

a. hurt b. hurts c. to hurt d. will hurt

3. If it..............., they will not go out.

a. rains b. rained c. rain d. raining.

4. Betty will not go to the party unless John ...................too.

a. go b. went c. going d. goes

5. Miss An does not want to go on the trip if nobody..............with her.

a. go b. goes c. went d. going.

6. Mr Smith has to work on weekends if his manager.............him to.

a. tell b. telling c. told d. tells.

7. Unless they ...............her to work hard, she would not.

a. encourage b. encouraged c. encourages d. encouraging.

I. Choose the best answer to complete the following sentences.

1. If Peter .........., Sarah will be sad because she wants to meet him very much

a. comes b. do not come c. does not come d. will come

2. If his teeth still ........, he will have to go to the dentist’s again.

a. hurt b. hurts c. to hurt d. will hurt

3. If it..............., they will not go out.

a. rains b. rained c. rain d. raining.

4. Betty will not go to the party unless John ...................too.

a. go b. went c. going d. goes

5. Miss An does not want to go on the trip if nobody..............with her.

a. go b. goes c. went d. going.

6. Mr Smith has to work on weekends if his manager.............him to.

a. tell b. telling c. told d. tells.

7. Unless they ...............her to work hard, she would not.

a. encourage b. encouraged c. encourages d. encouraging.

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

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

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

1 wouldn't do - were

2 did

3 were - would go

4 passed

5 went

6 won't go

7 spoke

1. wouldn't do, were

2. did

3. were, would go

4. passed

5. went

6. won't go

7. spoke

Chào em, em tham khảo nhé!

1. I(not do) wouldn't do that if I(be) were you
2. He never does homework.If he(do) did his homework (câu này thiếu mệnh đề chính em nhé)
3. If today (be) were Sunday, we (go) would go to the beach
4. Unless they (pass) passed their examinations, they would join the army
5. If Tom (go) went to bed earlier, he would not be so tired
6. If it's raining heavily, we (not go) won't go for a donkey ride
7. I could understand the French teacher if she (speak) spoke more slowly

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