CHUYÊN ĐỀ 2: CÂU ĐIỀU KIỆN LOẠI 1
Ex 1: Choose the best answer to complete the following sentences.
1. If I find it, I ………you.
a. will tell
b. would tell
c. had told
d. told.
2. Trees won't grow ……….. there is enough water.
a. if
b. when
c. unless
d. as
3. 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
4. If his teeth still …….., he will have to go to the dentist's again.
a. hurt
b. hurts
c. to hurt
c. will hurt
5. If it……………, they will not go out.
a. rains
b. rained
c. rain
d. raining.
6. Betty will not go to the party unless John ……………….too.
a. go
b. went
c. going
d. goes
7. Miss An does not ……………….to go on the trip if nobody goes with her.
a. want
b. wantes
c. wants
d. wanting.
8. Mr Smith …………. to work on weekends if his manager tells him to.
a. have
b. has
c. haves
d. hases.
9. Unless they ……………her to work hard, she would not.
a. encourage
b. encourage
c. encourages
d. encouraging.
10. ______they (be) happy if Kai ______(do) that?
A. Will be – does
B. Will they be – do
C. Are they – will do
11. Unless Suzy ______(start) now, she ______(not finish) the project on time.
A. start – won't finish
B. will start – don't finish C. starts – won't finish
12. Your mother ______(smile) happily if you ______(give) her some beautiful flowers.
A. smiles – give
B. will smile – give
C. will smile – gives
13. Peter ______(take) a taxi to get home if it ______(rain).
A. will take – rains
B. takes – rains
C. takes – will rain
14. If he ______(go) to the pub, he ______(come across) some old friends.
A. go – will come across
B. goes – comes across
C. goes – will come across
15. The meeting ______(begin) as soon as all of them ______(be) ready.
A. will begin – are
B. will begin – will be
C. begins – are
16. If my brother ______(study abroad), I ______(feel) happy for him.
A. studies abroad – feel
B. studies abroad – will feel
C. study abroad – will
feel
17. If Suran ______(go) to the supermarket, she ______(buy) some tomatoes.
A. will go – buy
B. goes – will buy
C. go – buy
18. His parents ______(be) upset if he ______(smoke).
A. won't be upset – smokes
B. are – will smoke
C. will be – smokes
19. If you ______(be) thirsty, ______(drink) some grape juice.
A. are – will drink
B. will be – drink
C. are – drink
20. What ______(happen) if you ______(not go) to school on time?
A. happen – won't go
B. will happen – don't go C. will happen – doesn't go
21. Unless Lam ______(hurry up), he ______(be) late for work.
A. won't hurry up – will be
B. don't hurry up – will be C. hurries up – will be
22. If you ______(keep) eating too much, you ______(be) getting fat.
A. keep – will be
B. keep – are
C. will keep – are
23. San ______(not know) the secret unless you ______(tell) him.
A. don't know – tell
B. won't know – tell
C. won't know – tells
24. If Kamy ______(get) a haircut, she ______(look) much better.
A. gets – look
B. will get – looks
C. gets – will look

Ex 2: Identify the one that has a mistake by circling the corresponding letter a, b, c, d.
1. If we will reduce the speed of population growth, there will be less pressure on the earth.
A
b
c
d
2. Unless we leave a bowl of water under the sun, it will evaporate.
A
b
c
d
3. If we continue to use fuels at the current rate, we would soon have to face a fuel crisis.
A
b
c
d
4. If tomorrow the weather will be bad, the match will be postponed.
a.
b.
c.
d.
5.. If you will see Mike today, please ask him to phone me.
a.
b.
c.
d.
Ex 3: Chia động từ trong ngoặc
1) If I (study) …………………………, I (pass) …………………….. the exams.
2) If the sun (shine) …………………………, we (walk) ………………………… to the town.
3) If he (have) ………………………… a temperature, he (see) ………………………… the doctor.
4) If my friends (come) …………………………, I (be) ………………………… very happy.
5) If she (earn) ………………………… a lot of money, she (fly) ………………………… to New
York.
6) If we (travel) ………………………… to London, we (visit) ………………………… the
museums.
7) If you (wear) ……………… sandals in the mountains, you (slip) ………………… on the rocks.
8) If Rita (forget) …………… her homework, the teacher (give) ………………… her a low mark.
9) If they (go) ………………………… to the disco, they (listen) ………………………… to loud
music.
10) If you (wait) ………………………… a minute, I (ask) ………………………… my parents.
Ex 4: Điền dạng đúng của động từ
1. If she ....................(work) hard, she .....................(pass) the exam.
2. If I ..................(come) soon, I ....................(phone) you.
3. She ...................(feel) sad if you ....................(not, give) her a gift.
4. If Peter ......................(go) to work late again, he .................(be) sacked.
5. No one .........................(know) the truth if you ................(not, reveal)
6. If the boy ....................(eat) that apple, he ....................(be) ill.
7. If you .....................(not, hurry), you .....................(miss) the bus.
8. Tell him about this story if you .........................(see) him.
9. If you ..........................(have) a day off where you..............(go)?
10. If he ..................(cook) the meal himself, help him.
11. If few people .....................(come) to the meeting, please postpone to the other day.
12. If it .......................(not, be) warm this afternoon, we ...................(put off) the game.
13. Your father ...............(pick) you up if you ..................(come) back late?
14. What you ..................(speak) if you ....................(meet) a foreigner?
15. Unless he .................(answer) all my questions, I ...................(not, help) him.
16. If It (not rain) ………today, they ( go)…………camping.
17. Peter (play) ………soccer with his friends if he (have) …….free time.
18. If Jane (study) ………..harder, she (pass) …………….the entrance exams.
20. David (come and see) ……………….his girlfriend if he (not have to/work) ……..on a night
shift.
21. This machine (break) ……..down if it (not use) ……..quite often.
22. Helen (come)…….. to class late if she (not run)…………….fast enough.
23. Giang's parents (be)……..very happy if she (get) ……….good marks at school.
24. Thomas (visit) …….Ha Long Bay if he (earn) ……enough money.
25. If you (brush) ….your teeth regularly, you ( not have)……….a toothache.

26. If Carol (have) ….enough qualifications for the job she applied, she ( get) ……..it.
Ex 5: Viết lại câu không đổi nghĩa
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 ..........................................................................................................
11. Do morning exercises regularly, your body will be fitter.
If ..........................................................................................................
12. Unless we use renewable energy, we will have nothing for the future generation.
If ..........................................................................................................
13. The climate will change unless we reduce the use of non-renewable energy.
If ..........................................................................................................
14. Lock all the doors and no one can break into your house.
If ..........................................................................................................
15. Unless we stop hunting polar bears, they will become extinct in near future.
If ..........................................................................................................
Ex 6: Bài tập biến đổi Unless = if …….not.
1. If Andrew is not lazy, he will pass the final examination. (unless)
→…………………………………………………………………………………………
2. John will not catch the train unless he runs more quickly. (If)
→…………………………………………………………………………………………
3. The tree will die if it isn't watered every day. (unless)
→…………………………………………………………………………………………
4. Life won't be very easy if we don't earn lots of money. (unless)
→…………………………………………………………………………………………
5. If you don't practice more often, your English won't be better.
→…………………………………………………………………………………………
6. Jack will be dismissed if he doesn't try to work harder.
→…………………………………………………………………………………………
Ex 7: Rewrite the sentences.
1. Work harder or you will lose your job.
→…………………………………………………………………………………………
2. Pay attention to the teacher or you won't understand the lessons.
→…………………………………………………………………………………………
3. Go to bed early or you can't get up early the next morning.

→…………………………………………………………………………………………
4. Save money now or you will be in debt in the future.
→…………………………………………………………………………………………
5. Read more referent books if you want to win a place at university.
→…………………………………………………………………………………………
6. Driving more carefully or you will have an accident.
→…………………………………………………………………………………………
7. Brush your teeth often in order not to get toothache.
→…………………………………………………………………………………………
8. Listen carefully or you won't know what to do.
→…………………………………………………………………………………………