III. Give the correct forms of the verbs in brackets.

1. If you ( go) ______go____away, please write to me.

2. If you (see) _____see_____Mary today, please (ask) ___ask_______her to call me.

3. If he (eat) _____eats_____another cake, he will be sick.

4. If he (take) _____takes_____my advice, everything can go well.

5. What you (do) _____will you do_____if she refuses your invitation?

6. Unless they (pass) ___passed_______their examinations, they would join the army.

7. You (be) ____will be______ill if you drink that water.

8. If it’s raining heavily, we (not go) ____won't go______for a donkey ride.

9. If he (try)___tries_______ hard, he’ll pass the examination.

10. If I (finish) ____finish______the work in time, I (go)_______will go___ to the football game.

11. If the weather stays good next weekend, we…will prbably go……… (probably / go ) away somewhere.

12. Come on! If we (hurry)…………hurry………….,we ( catch )……………will catch….. the bus.

13. There (be)………will be…………big floods every year if the cutting down of trees continues.

14. If there (be) ………is……….too much litter on the streets, the environment will become polluted.

15. If the sea level (rise)……………rises……, there will be floods in many parts of the world.

16. They will be late for their meeting if they ( not leave )………don' t leave…………………now.

17. If you aren’t careful, you (drop)………will drop…………………..the plates.

18. If anyone (phone)………………phones…………. me , tell them I’m out.

19. If he ( not use)…………doesn't use…………much pesticide on vegetables, they will become edible.

20. What (you/ do) ...........will you do.................... if you are free tomorrow, Lan?

21. If I ...............study.............. (study), I...........................will pass..........................(pass) the exams.

22 If the sun...............shines............ ( shine), we ....will walk.................... (walk) to the town.

23. If he ...............has.............. ( have) a temperature, he .........will seee................... ( see) the doctor.

24. If my friends ............come.................( come), I .....................will be................( be) very happy.

25. If she.................earns........( earn) a lot of money, she ...................will fly...........( fly) to New York.

26. If we ..............travel........( travel) to London, we ..................will visit..............( visit) the museums.

27. If you .......wear....... ( wear) sandals in the mountains, you...........will slip...........( slip) on the rocks.

28. If Rita ........forgets..... (forget) her homework, the teacher.....will give...............(give) her a bad mark.

29. If they.........go..................(go) to the disco, they ..............will listen................(listen) to loud music.

30. If you .........wait....................(wait) a minute, I.................will ask...........(ask) my parents.

1 works will pass

2 come will phone

3 will feel do not give

4 goes will be

5 can know do not reveal

6 eats will be

7 do not hurry will miss

8 see

9 had would you go

10 cooks

1 rains - won't go

2 is - will have

3 go - will go

4 will miss - doesn't live

5 see - will tell

6 will be - don't hurry

7 doesn't rain - will go

8 will be - leave

1. If it rains tomorrow, we won't go to the zoo

2. If it is a nice day, I'll have lunch in the park

3. If you go camping in the summer, I'll go with you

4. He'll miss the bus if he doesn't leave now

5. If I see Kevin, I'll tell him you called

6. We'll be late if we don't hurry

7.  If it doesn't rain tomorrow, we'll go to the beach

8. We'll be early if we leave now

1. If I had wings, I wuoldn't have to...

2. we 'll have to go without John if he doesn't arrive soon

3.  How would you feel if you...

4. .................. If you visit Mexico

5.  .................... If you weren't be so unfriendly

1 if i HAVE wings , i WON'T HAVE TO take an air plane to fly home

2 we'll have to go without John if he  DOESN'T ARRIVE soon

3 how WOULD YOU FEEL if you were in my position

4 will you send me a postcard if you VISIT Mexico ?

5 you would have  a lot of friends if you WEREN'T so friendly

1. take

2. won't make

3. will happen

4. spoke

5. would take

6. didn't eat

7. won't go

8. would be 

9. doesn't start

10. get

11. Would she leave

12. were

1. took 

2. won't make 

3. would happen

4. spoke 

5. should take 

6. didn't eat 

7. won't go 

8. would be 

9. doesn't start 

10. gets 

11. will/leave 

12. were 

1. take

2. will not make

3. would happen 

4. spoke

5. will take 

6. did not eat 

7. will not go

8. would be 

9. is not starting 

10. gets 

11.  may leave

1. take

2. won't make

3. will happen

4. spoke

5. would take

6. didn't eat

7. won't go

8. would be 

9. doesn't start

10. gets

11. Would she leave

FURTHER PRACTICE: CONDITIONAL SENTENCES TYPE 1

I. Give the correct form of the verbs in brackets.

1. If he (do)………DOES……… well in the exam, his parents will buy me an MP3 player.

2. If my sister borrows my clothes again, I (scream)……………WILL SCREAM…………..!

3. We’ll leave at 6 o’clock if the weather (be)…………IS………… bad.

4. They (not mind)………………WON'T MIND………………… if we’re a bit late this afternoon.

5. Sarah will be very annoyed if Dave (not call)…………DOESN'T CALL………. her this evening.

6. WILL You still (go)…………GO…………. to the concert if the tickets cost 60 euros?

7. If Rania doesn’t come to the party, WILL Greg (be)…………BE……… upset?

8. I’ll be surprised if Doug and Dana (not get)…………………DON'T GET……………….. a new car soon.

9. If she (leave)……………LEAVES…………… at five o’clock, she’ll be there by half past seven.

10. We (call) ……………………WILL CALL……………………you if we have any problems.

11. He’ll be late for the train if he (not start)……………DOESN'T START………………. at once.

12. If I lend you $100, when WILL you (repay)…………………REPAY………………… me?

13. Unless I have a quiet room, I (not be able)……………WON'T BE ABLE………….. to do any work.

14. If we leave the car here, it (not be)………………WON'T BE…………….. in anybody’s way.

15. Someone (steal)…………………WILL STEAL……………… your car if you leave it unlocked.

16. Unless he (work)……………WORKS………… harder, he will be fired.

17. If you come late, they (not let)……………WON'T LET…………… you in.

18. If you (not go) ………DON'T GO……………away, I’ll call the police.

19. If he (eat) …………EATS……………..all that, he will be ill.

20. What (happen) …………WILL HAPPEN…………….if my parachute does not open?

II. Find and correct the mistake.

1. I get rid of my old car if you don’t need it.

get -> will get

2. You won’t be able to use grammar correctly unless you don’t understand it.

unless -> if

3. Nobody will like you if you won’t change your behaviour.

won't -> don't

4. If I’ll order the new TV set tomorrow, we’ll get it on Monday.

I'll -> I

5. Anna doesn’t come to the party if you don’t invite her.

doesn't -> won't

6. Jack won’t go to dance unless Marry will ask him.

will ask -> asks

7. If you will need my help, I will be in my office until 4:00.

will need -> need

8. If you finish your dinner, you are allowed to watch TV.

are -> will be

9. If we will go shopping tomorrow, I’ll probably buy a new dress.

will go -> go

10. If mum is tired tonight, I cook dinner.

cook -> will cook

11. John will tell us if there will be any news.

will be -> is

12. If I won’t get a good mark in the geography test, I’ll be very annoyed!

won't -> don't

13. You are tired in the morning if you don’t go to bed soon.

are -> will be

14. If you see Karen, do you ask her to call me?

do -> will

15. Does Frank come with us if we go to the beach at the weekend?

Does -> Will

16. If you need help, will tell me!

will tell -> tell

17. If we goes on holiday this summer, we’ll go to France.

goes -> go

18. We won’t have a picnic if the weather didn’t improve.

FURTHER PRACTICE: CONDITIONAL SENTENCES TYPE 1

I. Give the correct form of the verbs in brackets.

1. If he (do)………does……… well in the exam, his parents will buy me an MP3 player.

2. If my sister borrows my clothes again, I (scream)……………will scream…………..!

3. We’ll leave at 6 o’clock if the weather (be)…………is………… bad.

4. They (not mind)………………won't mind………………… if we’re a bit late this afternoon.

5. Sarah will be very annoyed if Dave (not call)…………doesn't call………. her this evening.

6.  Will You still (go)…………go…………. to the concert if the tickets cost 60 euros?

7. If Rania doesn’t come to the party, will Greg (be)…………be……… upset?

8. I’ll be surprised if Doug and Dana (not get)…………………don't get……………….. a new car soon.

9. If she (leave)……………leaves…………… at five o’clock, she’ll be there by half past seven.

10. We (call) …………………will call………………………you if we have any problems.

11. He’ll be late for the train if he (not start)…………………doesn't start…………. at once.

12. If I lend you $100, when will you (repay)…………………repay………………… me?

13. Unless I have a quiet room, I (not be able)……………won't be able………….. to do any work.

14. If we leave the car here, it (not be)…………won't be………………….. in anybody’s way.

15. Someone (steal)……………will steal…………………… your car if you leave it unlocked.

16. Unless he (work)…………works…………… harder, he will be fired.

17. If you come late, they (not let)……………won't let…………… you in.

18. If you (not go) …………don't go…………away, I’ll call the police.

19. If he (eat) …………eats……………..all that, he will be ill.

20. What (happen) …………will happen…………….if my parachute does not open?

II. Find and correct the mistake.

1. I get rid of my old car if you don’t need it.

get -> will get

2. You won’t be able to use grammar correctly unless you don’t understand it.

don't -> bỏ / unless -> if

3. Nobody will like you if you won’t change your behaviour.

won't -> don't

4. If I’ll order the new TV set tomorrow, we’ll get it on Monday.

I'll -> I

5. Anna doesn’t come to the party if you don’t invite her.

doesn't -> won't

6. Jack won’t go to dance unless Marry will ask him.

will ask -> asks

7. If you will need my help, I will be in my office until 4:00.

will -> bỏ

8. If you finish your dinner, you are allowed to watch TV.

are -> will be

9. If we will go shopping tomorrow, I’ll probably buy a new dress.

will go -> go

10. If mum is tired tonight, I cook dinner.

cook > will cook

11. John will tell us if there will be any news.

will be -> is

12. If I won’t get a good mark in the geography test, I’ll be very annoyed!

won't get -> get

13. You are tired in the morning if you don’t go to bed soon.

are -> will be

14. If you see Karen, do you ask her to call me?

do -> will

15. Does Frank come with us if we go to the beach at the weekend?

Does -> will

16. If you need help, will tell me!

will tell -> tell

17. If we goes on holiday this summer, we’ll go to France.

goes -> go

18. We won’t have a picnic if the weather didn’t improve.

didn't -> doesn't

18. We won’t have a picnic if the weather didn’t -> doesn't improve.

III. Choose IF or UNLESS to complete the following sentences.

1. UNLESS my teacher helps me, I’ll be unable to do it.

2. IF I meet his father, I’ll tell him the whole truth.

3. You won’t get well UNLESS you stop eating junk food.

4. UNLESS you exercise regularly, you won’t be able to lose some weight.

5. IF you exercise regularly, you’ll lose some weight.

6. The teacher will be mad IF you don’t do the homework.

7. You can’t go on vacation IF you don’t save your money.

8. You will feel cold UNLESS you wear a jacket.

9. They’ll arrive on time IF they hurry.

10. Don’t call me late UNLESS it’s an emergency.

IV. Rewrite the following sentences.

1. If you don’t study harder, you’ll fail the next exam.

=> Unless you study harder, you'll fail the next exam

2. If he doesn’t practice writing every day, he can’t improve his writing skill.

=> Unless he practices writing every day, he can’t improve his writing skill

3. Unless this man is a driver, he can’t help you move by car.

=> If this man isn't  a driver, he can’t help you move by car

4. Unless you go out more often, you might fall ill.

=> If you don't go out more often, you might fall ill

5. If you don’t return this book to the library today, you’ll have to pay a fine.

=> Unless you return this book to the library today, you’ll have to pay a fine 

6. If you don’t practice harder, you will lose in the next game.

=> Unless you practice harder, you will lose in the next game

7. If Nam doesn’t speak English every day, he will easily forget how to use it.

=> Unless Nam speaks English every day, he will easily forget how to use it.

8. Unless our team had joined the competition, we would not have achieved this prize.

=> If our team had not joined the competition, we would not have achieved this prize

9. If students don’t return books to the library this week, they’ll have to pay a fine.

=> Unless students return books to the library this week, they’ll have to pay a fine

10. If Peter doesn’t study hard, he will get low marks.

=> Unless Peter studies hard, he will get low marks

11. This movie was so boring, so he didn’t watch it.

=> Because this movie was so boring, he didn’t watch it

12. I haven’t seen Mai for 4 years.

=> I last saw Mai 4 years ago

13. Bao was ill yesterday. He did all his homework.

=> Although Bao was ill yesterday,he did all his homework

14. Nowhere is more comfortable than my home.

=> My home is the most comfortable place

15. I started teaching English three years ago.

=> I have taught English for three years

16. Walk faster or you will miss the bus.

=> If you ​don't walk faster, you will miss the bus

17.  I won’t enjoy the film if you aren’t with me.

=> Unless you are with me, I won't enjoy the film

18. You must leave home early or you will miss the flight.

=> If you don't leave home early, you will miss the flight

19. John will pass the driving exam if he isn’t nervous.

=> Unless John is nervous, he will pass the driving exam

20. They will go on holiday if they have time.

=> Unless they don't have time, they will go on holiday

21. You have to get up early or you will be late for school.

 => If you don't get up early, you will be late for school

22. He will take a taxi if it rains.

=> Unless it rains, he will not take a taxi

1sees/gives

2eats/is

sees/ will give 

eats/ will be

find/ will telephone

reads/ will ruin

leave/ will steal 

don't open/ will fall

washes/ will give

needs/ will borrow. 

don't go/ will send

am/ will go

sees/ will give 

eats/ will be

find/ will telephone

reads/ will ruin

leave/ will steal 

don't open/ will fall

washes/ will give

needs/ will borrow. 

don't go/ will send

am/ will go .

Ex2: Complete the conditional sentences with the correct form or tense of the verbs in brackets. Add will, would, or modal verbs if necessary:

1. You might catch a cole if you (take) __took__a shower late at night.

2. My sister ( not make) _wouln't make___a cake if she doesn’t have enough ingredients.

3. What ( happen) would happen____if there was no electricity?

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

5. You ( take) _will take___a break from work if you feel stressed.

6. If Nancy ( not eat) _didn't eat___so much junk food, she’d lose weight.

7. If it isn’t hot tomorrow, we ( not go) __don't go__to the beach.

8. If I had wings, I ( be) _would be___able to fly like Perter Pan.

9. She won’t finish it on time if she ( not start) __doesn't start___right now.

10. She ‘s going to take a vacation next week if she ( get) __gets__time off work.

11. Was she ( leave) _leave___early if she ‘s finished her work?

12. If I ( be) __were___you, I wouldn’t make a decision now.