1.if I go away , please ....look.. ( look ) after the dog and the cat for me .
2.If you .......had been.... ( be) in London at that time , I should have given it to you 
3.If he eats another cake , he ......will be..... ( be ) sick . 
4.If men ..were......... ( be ) more  reasonable , there would be no more wars . 
5.I .............wouldn't do.... ( not do ) that if I were you . 
6.If he ....had taken............ ( take ) my advice , everything would have gone well  .
7.I would have come sooner if I ........had known......... ( know) you were here . 
8.He never does his homework . If he .....did...... ( do) it , he ...wouldn't worry......( not worry ) about the exam . 
9.It’s too bad we lost the game . If you ...had played.......( play ) more carefully , we ....would have won.....( win ) that game . 
10.What .......will......... you ...do.............. ( do ) if she refuses your invitation ?
11.If today ....were...... (be) Sunday , we .......would go..... ( go) to the beach for swimming . 
12.They ..............would make...... ( make) less mistakes if they were more careful .
13.Unless they .......passed....... ( pass) their exams , they would join the army 

1, will look

2, are

3, will be

4, were

5, wouldn't do 

6, took

7, knew

8, does/ won't worry 

9, played / would win

10, will you do ...?

11, was / would go

12, would make

13, passed

1.if I go away , please .............look....... ( look ) after the dog and the cat for me .
2.If you .........had been........... ( be) in London at that time , I should have given it to you 
3.If he eats another cake , he ............won't be........... ( be ) sick . 
4.If men .......were............ ( be ) more  reasonable , there would be no more wars . 
5.I ............wouldn't do............... ( not do ) that if I were you . 
6.If he ........had taken............ ( take ) my advice , everything would have gone well  .
7.I would have come sooner if I .............had known............ ( know) you were here . 
8.He never does his homework . I he ........does...... ( do) it , he ......won't worry.......( not worry ) about the exam . 
9.It’s too bad we lost the game . If you .....had played......( play ) more carefully , we ...would have won.........( win ) that game . 
10.What .........will......... you ......do........... ( do ) if she refuses your invitation ?
11.If today ....is.......... (be) Sunday , we .......will go............ ( go) to the beach for swimming . 
12.They .............would make............... ( make) less mistakes if they were more careful .
13.Unless they .........passed............ ( pass) their exams , they would join the army 

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

Complete the Conditional Sentences (Type II) by putting the verbs into the correct form. Use 
conditional I with would in the main clause.
1.  If he (start) ___started_______  at once, he (arrive)___would arrive_______ there by midday. 
2.  Tom (be)______would be ____  sick if he (eat) ______ate____ all those chocolates. 
3.  If I (lose)____lost______  my glasses, I (not be)____wouldn't be______ able to read. 
4.  You (become)___would become_______  ill if you (forget)______forgot____ your jacket.
5.  If the weather (get)___got_______  colder, I (buy)_____would buy_____ a new coat. 
6.  If we (have)_____had_____ a yacht, we (sail)___would sail_______the seven seas. 
7.  If he (have)____had______more time, he (learn)____would learn______karate.
8.  If they (tell)____told______their father, he (be)_____would be_____very angry.
9.  She (spend)___would spend_______a year in the USA if it (be)____were______easier to get a green card.
10.  If I (live)____lived______on a lonely island, I (run)______would run____around naked all day.
11. We (help)____would help______ you if we (know)__knew________ how.
12.  My brother (buy)___would buy_______a sports car if he (have)___had_______the money.
13.  If I (feel)_____felt_____better, I (go) ___would go_______to the cinema with you.
14. If you (go)____went______by bike more often, you (be / not)___wouldn't be_______so flabby.
15. She not / talk)____wouldn't talk______to you if she (be)___were_______mad at you.
16.  If I (be) ______were___(be) younger, he (travel)______would travel____ more.
18.  If we (not/ be)___weren't_______ friends, I (be) _____would be____angry with you.
19.  If I (have) ____had______enough money, I (buy)_____would buy_____a big house.
20.  If she (not/ be) ___weren't_______always so late, she (be) _____would be_____promoted.
21.  If we (win) ____won______the lottery, we _____would travel______ (travel) the world.
22.  If you (have)___had_______ a better job, we (be)____would be______ able to buy a new car
23.  If I (speak)___spoke_______ perfect English, I  (have) ___would have_______a good job.
24.  If we (live)__lived________ in Mexico, I (speak) _____would speak_____Spanish.
25.  If she (pass)____passed______ the exam, she ____would be_____ (be) able to enter university.
26.  She (be)____would be______ happier if she (have)_____had_____ more friends.
27.  We (buy)____would buy______ a house if we (decide)_____decided_____ to stay here.
28.  They (have)_____would have_____ more money if they ___didn't buy_______ (not / buy) so many clothes
29.  We (come)____would come______ to dinner if we ___had_______ (have) time.
30.  She (call)___would call_______ him if she (know)_____knew_____ his number. 
31.  They (go)___would go_______ to Spain on holiday if they (like)______liked____ hot weather.
32.  She (pass) ___would pass_______the exam if she ___studied_______ (study) more.
33.  I (marry)___would marry_______ someone famous if I (be)____were______ a movie star.
34.  We never (be)____would never be______ late again if we (buy)____bought______ a new car.
35.  You (lose)_____would lose_____ weight if you (eat)___ate_______ less.

16. If we ____go____________ (go) on holiday this summer, we ____will go____________ (go) to Spain.

17. If the weather ____doesn't improve____________ (not/improve), we _______won't have_________ (not/have) a picnic.

18. If I ___don't go_____________ (not/go) to bed early, I ___will be_____________ (be) tired tomorrow.

19. If we ____eat____________ (eat) all this cake, we __will feel______________ (feel) sick.

20. If you ____don't want____________ (not/want) to go out, I _____will cook___________ (cook) dinner at home.

21. I _____will come___________ (come) early, if you __want______________ (want).

22. They ____will go____________ (go) to the party if they _______are_________ (be) invited.

23. She ____will stay____________ (stay) in London if she _______gets_________ (get) a job.

24. He _____won't get___________ (not/get) a better job if he _______doesn't pass_________ (not/pass) that exam.

25. I __will buy______________ (buy) a new dress if I ___have_____________ (have) enough money.

26. She ______will cook__________ (cook) dinner if you ______go__________ (go) to the supermarket.

27. They _____will go___________ (go) on holiday if they _____have___________ (have) time.

28. We ____will be____________ (be) late if we ____don't hurry____________ (not/hurry).

29. She ____will take____________ (take) a taxi if it _________rains_______ (rain).

30. I ____won't go____________ (not/go) if you ____don't come____________ (not/come) with me.

I. Use the verbs in the list in the correct tense to complete the sentences. What conditional type is each sentences?

List verbs: recycle, win, ask, cost, take, catch, manage, decrease.

Ex: If there's more food in the world, it will cost less. (type 1)

1. If i ..won... a lot of money, i'd donate it to charity.

2. Lost of animals will disappear unless we ...take..... action soon.

3. If we use public transportation, the number of cars in the streets ....will decrease....

4. If you ....had asked.... me, i'd have helped you give out the flyers.

5. Our city would be cleaner if we ....recycled..... our waste.

6. If she hadn't gone out in the rain, she ...wouldn't have caught.... a cold.

7. The plane would have crashed if the pilot ......hadn't managed.... to land it.

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

EX 2. Put the verbs in brackets into the correct form of conditional sentence type 2.

1. were - would pass 

2. were - wouldn't eat

3. wouldn't increase 

4. would sort - were 

5. polluted - would recover 

6. didn't throw - wouldn't know  

7. didn't dump - would die 

8. would - do - were

9. weren't - would reduce 

10. owned - would build 

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