Must • Have to • Mustn't • Don't Have to

Have to do - ResponsibilitiesUse 'have to' in the past, present and future to express responsibility or necessity. NOTE: 'have to' is conjugated as a regular verb and therefore requires an auxiliary verb in the question form or negative.

Must do - ObligationsUse 'must' to express something that you or a person feels is necessary. This form is used only in the present and future.

Mustn't do - ProhibitionThe negative form of 'must' expresses the idea that something is prohibited - this form is very different in meaning than the negative of 'have to'!

Must / Have To - Mustn't / Not Have To Use either 'must','have to', 'mustn't or 'not have to' for the following questions. Once you've completed the quiz, scroll down to check you answers.

Must / Have To - Mustn't / Not Have To QuizUse either 'must','have to', 'mustn't or 'not have to' for the following questions. Once you've completed the quiz, scroll down to check you answers.

1. Jack _____(go) home early last night.

2. _____ (she/commute) to work?

3. Children _____(play) with cleaning liquids.

4. We _____(get) going it's already midnight!

5. When _____(you/arrive) for work last week?

6. You _____(do) the cleaning up this morning, I will!

7. They _____(visit) the doctor yesterday, as they were not feeling well.

Questions:

1. You _____________________________ bring a large suitcase on board.2. You _____________________________ smoke during takeoff and landing3. You _____________________________ stay in your seat during the whole flight.4. You _____________________________ listen to your personal stereo duringtakeoff and landing.5. You _____________________________ watch the in-flight movie.6. You _____________________________ buy duty-free goods.7. You _____________________________ unfasten your seat belt during takeoff andlanding.8. You _____________________________ bring your own food.

Questions:

1) Whatever you do, you __________________ touch that switch.It's very dangerous.2) I don't want anyone to know ; you __________________ tell anyone.3) He __________________ wear a suit to work but he usually does.4) I can stay in bed tomorrow morning because I __________________ go to work.5) There's a lift in the building, so she __________________ climb the stairs.6) You __________________ forget what I told you. It's very important.7) Sue __________________ get up early. She gets up early because she wants to.8) Don't make so much noise. We __________________ wake the baby.9) I __________________ eat too much. I'm supposed to be on a diet.10) You __________________ be a good player to enjoy a game of tennis.

Exercises Un it 31

31.1 Complete the sentences with have to I has to ' had to.

Bill sta rts work at 5 a.m. .u ..H.~.J:l.~ W:...9.~...Y.:P. at four. (he I get up)2 ' I bro ke my a rm last wee k ," "; __.,M !J.~....\:l.~X~ tg 9!? ..... to hospital ?' (yo u f go)3 There was a lot of noise from the street. m m _ the window.

(we I close)4 Karen ca n't stay for the whole meeting. .. ...... early. (she f leave)5 How old m _ .. • to dri ve in your cou ntry? (you I be)6 I do n't have much time. ....... . (I I hurry)7 How is Paul enjoying his new job? a lot? (he I t ravel)8 'I'm afraid I ca n't stay long.' 'What time _ ?' (you I go)9 'The bus was late again .' 'How long . .. _ _ _ ?' (you I wait)

10 There was no body to help me. f _n... .. _._ _.. everyth ing by myself. (I I do )

31.2 Complete the sentences using have to + the verbs in the list. Some sentences arc positive(I have to ... etc.l and some are negative (I don' t have to ... etc.):

ask do drive ~ go make make pay ~

1 I'm nc r working tomorrow, so I .....4g_':!J....tJ.~y.~....t:9....g~....~P early.2 Steve didn't know how [0 use the computer, so I ._.h.~ ~ s._I-).Q.~ him.3 Excuse me a momem - I . .. a phone call. I won't be long.4 I'm not so bus)". I have a few things to do, but I . them now.5 I couldn't find the street I wanted . I _._ _ somebody for directions.6 The ca r park is free. You .. to park you r car the re.7 A man was injured in rhe accident, but he ..._... .... TO hospi tal because it

wasn't senous.8 Sue has a senior posit ion in the company. She .....9 \~lhen Patrick starts his new job next month, he

work e\'er~' day.

........_ important decisions........ ... .... 50 miles to

31.3

31.4

In some of these sentences, must is wrong or unnatural. Correct the sentences where necessary.

1 It's later than I thought. I must go. .. Q~....1h~.Y.~.. J.Q..i~..P.:!.~9.. .c..Qr..r.lc'.c;n. .._.....2~e\'ery day from 8.30 to 5.30. . !.....t'.~.~.~....~....~P~~.

3 You must come and see us agai n soon.4 Tom can't meet us tomo rrow. He must wo rk.5 I must work l a ~e yesterday even ing.6 I must get up ea rly to morro w. I have lots to do.7 J ulia wears glasses. She must wear glasses

since she was very young.

Complete the sentences with mustn't or don't/doesn't have to.

I don't wa nt any~me to know about our plan . You ......~.~.~~\..:.. tell anyone.2 Richard .._.M~.S:.I}J....~.~~.~.JQ ..... wear a suit to work, but he usua lly does.3 I ca n sta y in bed tomorrow morn ing beca use I . _ go to work.4 Whatever you do, you _ _._._._ __ _ _ _ to uch that switch. It 's very dangerous.5 There 's a lift in the bui lding, so we climb the stai rs.6 You _............. _ forget what I told you . It's very importa nt.7 Sue . get up early, but she usually does.8 Don'r make so much noise. We _.. . wa ke the children.9 I . .. n..... . ~ '_n eat (00 much. I'm supposed (0 be on a diet.

10 You ~ _... _.. be a good player to enjoy a game of tennis.

- Addit ional exercise 16 (page 311 ) 63

Quiz Answers

1. Jack had to go(go) home early last night.

2. Does she have to commute(she/commute)to work?

3. Children mustn't play(play) with cleaningliquids.

4. We must get(get) going it's already midnight!

5. When did you have to arrive(you/arrive) forwork last week?

6. You don't have to do(do) the cleaning up thismorning, I will!

7. They had to visit(visit) the doctor yesterday,as they were not feeling well.

ANSWERS:

1. mustn't2. mustn't3. don't have to4. mustn't5. don't have to6. don't have to7. mustn't8. don't have to

ANSWERS:

1. mustn't2. mustn't3. doesn't have to4. don't have to5. doesn't have to6. mustn't7. didn't have to8. mustn't9. mustn't10. don't have to

a. You mustn’t stop. b. You must stop. c. You must slow down.

a. You mustn’t enter. b. You must enter. c. You must slow down.

a. You must stop and wait. b. You must go c. You must slow down

a. You mustn’t walk. b. You mustn’t turn right. c. You mustn’t turn left.

a. You mustn’t smoke. b. You mustn’t drop litter.  c. You must cross the street.

a. You must stop b. You mustn’t eat or drink. c. You mustn’t park here.

a. You mustn’t wait. b. You mustn’t make a U-turn. c. You must slow down.

a. You must stop. b. You mustn’t turn left. c. You mustn’t take photos.

a. You mustn’t left. b. You mustn’t turn right.  c. You must slow down.

a. You must stop. b. You must slow down c. You must go.

a. You mustn’t enter.  b. You must park.  c. You mustn’t drop litter.

a. You mustn’t park here. b. You must stop. c. You mustn’t slow down.

a. You mustn’t go. b. Cyclists mustn’t ride here. c. Pedestrians mustn’t enter.

a. You mustn’t stop. b. You must go. c. You must stop and wait.

a. Cyclists mustn’t go. b. Motorists mustn’t go. c. Pedestrians must go.

a. It’s a zebra-crossing. b. It isn’t a crosswalk. c. Petestrians mustn’t walk.

a. You mustn’t drop litter. b. You mustn’t fight. c. You mustn’t run.

a. You must park. b. You must walk. c. Pedestrians must wait.

a. You must swim. b. You must walk. c. You mustn’t swim here..

a. You mustn’t catch fish. b. You must fasten your seatbelt. c.You must slow down.

Complete the sentences: can, can’t, must, mustn’t, need, needn’t, should, shouldn’t!

1. You ……………………….. finish your work, because it’s late.2. We ……………………….. get up early, we ……………………….. be late.3. Don’t be nervous! You ……………………….. be calm. You ……………………….. be

nervous.4. John ……………………….. translate the English text. He ……………………….. learn

more.5. People ……………………….. smoke in this building, because it’s forbidden.6. These boys are too young, they ……………………….. go to the disco.7. The windows aren’t dirty, youe ……………………….. clean them.8. It’s very hot ion summer. We ……………………….. water the flowers twice a week.9. The mother ……………………….. go to the bank, because she hasn’t got any money.10. Jim and jack have a lot of horses. They ……………………….. ride a horse.11. I ……………………….. help you, because I don’t know the solution.12. Before dinner people ……………………….. wash their hands.13. We ……………………….. the meeting early, we ……………………….. stay until the

end.14. This girl ……………………….. drink so much cola. It’s not healthy.15. Susan has a lot of free time, she ……………………….. hurry.16. It’s a fantastic movie. You ……………………….. see it.17. You ……………………….. learn to ride a bike. It’s very useful.18. We ……………………….. forget to visit our grandparents at the weekend.19. Jim ……………………….. remember to feed his cat before he goes to work.20. Children ……………………….. eat a chocolate every day.21. This family ……………………….. buy a bigger house, because this house is too small

for them.22. My friend ……………………….. relax more, because he is depressed.23. Our mother is very old and ill, she ……………………….. work in the garden.24. This flat isn’t big enough, you ……………………….. rent this.25. These documents are very important, we ……………………….. lose them.26. This dog isn’t hungry, you ……………………….. feed it.27. I ……………………….. speak German fluently, because I always learn hard.28. Tom ……………………….. forget to turn off the TV before he goes to bed.29. Julia ……………………….. remember to turn off the lights before she goes away.30. You ……………………….. go home. You ……………………….. stay here if you want.31. I ……………………….. write an essay now. I ……………………….. do it tomorrrow.32. You ……………………….. be afraid of my dog, because it’s very friendly.33. Our children ……………………….. sing well. They don’t have a good ear for music.34. Children ……………………….. watch Tv so much. They ……………………….. learn

more.35. I ……………………….. forget to do the English homework.36. Peter ……………………….. work hard, but he is lazy.37. We ……………………….. eat less chocolate. We are very fat.38. Children ……………………….. go to school every day.39. I feel bad, I ……………………….. go to the doctor.40. You ……………………….. be late, this meeting is very important.41. This film is too agressive. Children ……………………….. see it.42. It’s late, I ……………………….. go now.43. Big cities are very dangerous. Women ……………………….. go out in dark.44. This man is very ill, he is in hospital. He ……………………….. go home.45. We ……………………….. work a lot because we ……………………….. money for

food and clothes.46. Maria ……………………….. an umbrella because it’s raining.47. Roads are slipperyin winter, you ……………………….. drive carefully.48. These parents are very poor. They ……………………….. save more money.49. You ……………………….. worry. This illness isn’t so serious.

must/ mustn’t / don’t have to

I …………………….. do my homework before dinner.

You …………………….. wait for me, I will be late.

Here we …………………….. talk so loudly.

Children …………………….. eat hamburger every day.

I …………………….. get up early tomorrow, I can stay in bed longer.

People ……………………..lie in the sun at lunchtime, because it is harmful.

We …………………….. save money for our holiday.

Mia …………………….. jump out of the window.

Chris …………………….. learn a lot of new words.

Chuck ……………………. relax a bit, if he doesn’t want to be ill.

You …………………….. go to see the dentist, if you have a bad tooth.

Dad …………………….. work at the weekend too.

Mum …………………….. cook today, we go to a restaurant.

I …………………….. turn on the TV after 9 o’clock.

We …………………….. smoke at school.

People …………………….. work hard because life is expensive.

Children …………………….. watch agressive films.

Coffee is not healthy, you …………………….. drink too much.

The teacher …………………….. worry, children love his lessons.

I want to be a millionaire, so I ……………………..work very hard.

My parents aren’t rich, so I ……………………..spend much money on stupid things.

You …………………….. go to the bank, I canb give you some money.

You …………………….. take drugs, it is unhealthy.

You …………………….. run home, I fed the dog.

Youngsters …………………….. stay out late, it’s dangerous.

You …………………….. give up karate, your leg will be OK.

Chuck wants to marry Blair so he …………………….. be a good man.