Ability/Obligation/Necessity/Absence of necessity/Prohibition
Date: 2015-10-07; view: 1310.
Expressing criticism
a) You ought to/should have beenmore careful. (It would have been better if you had been more careful)
b) You shouldn't have done it. (It would have been better if you hadn't done it.)
Ex.35 Complete each sentence with can or can't + the verb in brackets. Use a form of be able to if can / can't is not possible.
1. That shelf is too high. I can't (reach) it.
2. What's that noise? I ___________ (hear) something.
3. There's something wrong with this door. I _________ (open) it.
4. I'm really hungry! I __________ (take)my lunch break yet.
5. Sorry, I __________ (come) tomorrow. I'll try and see you next week.
6. I really want __________ (use) a computer properly.
7. Don't push Harry in the water. He _________ (swim).
8. I feel terrible. I __________ (sleep) for the past couple of nights.
Ex.36 Complete the sentences with could or couldn't.
- 1. The suitcase was so heavy I couldn't lift it.
- I learned to play the piano when I was ten but I __________ only play one song.
- I have to go home soon, my parents said I __________ stay out late.
- We don't know how, but ancient Egyptians __________ move huge pieces of stone to build the pyramids.
- Frank Sinatra _________ sing really well but he _________ write his own songs.
- He _________ do the homework because he lost his book.
- The Britons __________ make soap before the Romans.
- 100 years ago, most people _________ travel abroad because it was too expensive.
- The class worked hard so they _________ leave early.
- When you were younger you _________ play any musical instruments?
Ex.37 Fill in the gaps with can, can't, could, couldn't or was/wasn't able to.
- I had my hands full, so I couldn't/wasn't able to open the door.
- When I was young, I ___________________ stand on my head.
- Although he felt ill, he ___________________ finish all the paperwork.
- Tony is clever. He ___________________ speak three languages.
- I ___________________ afford that bag. It's too expensive.
- Although it was dark, he ___________________ find his way through the woods.
- I heard his voice calling me, but I __________________ see him.
- We're busy tonight, so we ____________________come to the party.
- When I entered the house, I ___________________smell fresh bread baking.
- I ___________________drive a car. I learnt when I was eighteen.
Ex.38 Complete the sentence with must or mustn't. They are all strange but true laws.
- 1. In New Hampshire, USA, you mustn't pick up seaweed from the beach.
- In Louisiana, USA, schoolchildren ___________ call their teachers Sir or Ma'am.
- In Canada you _________ let a llama eat grass in a national park.
- In Italy, a man _________ wear a skirt in public.
- In Illinois, USA, you _________ use the steering wheel when you drive a car.
- In Michigan, USA, people ________ swear in front of women and children.
- In Baltimore, Maryland, USA, you ________ take a lion into a cinema.
- In Kentucky, USA, everyone __________ take at least one bath every year.
Ex.39 Complete the sentences with mustn't or don't / doesn't have to.
- 1. You mustn't stand on the desk. You'l1 break it.
- We _________ take an umbrella. I'm sure it isn't going to rain.
- You _________ put a stamp on this letter. It says FREEPOST on it.
- We _________ forget to take the presents with us when we go.
- In our country children __________ go to school on Saturday.
- You _________ touch the ball. It's against the rules.
Ex.40 Complete the sentences with must, have to, be to in the correct form.
1. As we had agreed I ________________ meet him at 7.
2. I know I ____________ do the work myself. It's my duty.
3. Susan says I ___________drive her to the station. She thinks it's my duty.
4. The babysitter was ill and Ellen ___________look after the child herself.
5. ‘You ___________ look after the children properly, feed them and take them for a walk,' Mrs. Swift said to the babysitter.
6. The guide _________ meet the group and take them to the hotel yesterday.
7. The children didn't understand the rule and the teacher __________explain it again.
8. ‘You __________cross the road alone!' the mother said to the child.
9. I ____________take the umbrella because the forecast was bad.
10. The bell had gone and I ____________ answer the question.
11. I didn't know I __________ work extra hours. We hadn't agreed on that.
12. ‘When ____________I___ return the book?' Steve asked the librarian.
13. I _______________interrupt the speaker because I didn't get to the point.
14. You __________shout at children.
15. I _____________sell the car one of these days. It keeps breaking down.
Ex.41 Fill in the gaps with must, mustn't or needn't/don't have to.
- A: You must study hard to pass the exams.
B: I know. I study every evening.
- A: You ___________________ be late for your job interview.
B: I know. I'll leave early so as to get there on time.
- A: Shall I collect the children from the party?
B: No, you __________________ collect them. Mrs Shaw is giving them a lift home.
- A: Do you want me to wait for you after work?
B: No, you __________________ wait. I can walk home by myself.
- A: You___________________ interrupt while people are talking.
B: No. It's very bad manners to do that.
- A: My dog has been ill all week.
B: Oh dear! You ___________________ take him to the vet.
- A: It's Sally's birthday on Wednesday.
B: I know. I ___________________ remember to buy her a present.
- A: Shall I wash the dishes for you?
B: No, you ___________________ do that. I'll do them later.
Ex.42 Complete the text with the verbs in brackets and a form of can or have to.
Rapid population growth a (cause) can cause problems. The government b (provide) ___________ more hospitals, schools and jobs, farmers c (produce) _____________ more food and all the extra people d (have) ______________ homes. Ina less economically developed country, the economy e (grow) _____________ fast enough to deal with the problems. Many countries realize that they f (control) _____________ population growth. Some countries believe they can encourage family planning through education and publicity. Other countries believe that they have such a serious problem that they g (take) ______________ special measures to control the number of people. InChina, for example, there is a ‘one child' policy. Couples h (ask) ______________ permission from the government to marry, and women i (be) ______________ at least 25 years old. The couple then j(ask) ___________ permission to have a child, and are allowed only one.
Ex.43 Fill the gaps with needn't have or didn't need to and the correct form of the verb in brackets.
- I ran all the way to work, but I needn't have hurried (hurry) because I was the first person to arrive.
- We ___________________ (hurry), so we stopped to have lunch on the way.
- I went to college today, but I ___________________ (go) as all the lectures were cancelled.
- I ___________________ (ask) the way to Lewes, since I'd been there before.
- I ___________________ (buy) any food, so I didn't go to the supermarket.
- I ___________________ (buy) any food after all, because we had plenty at home.
- I ___________________ (pack) my shorts, as it rained all week.
- We __________________ (pack) many things, as we would only be away for one night.
Ex.44 Complete the comment on the situation with either didn't need to or needn't have (done) and the verb in brackets.
- I worked fast and finished my project on time, but now our teacher has given the class three more weeks.
(work) I needn't have worked so hard!
- At least I managed to do it without working at the weekend.
(work) _________________________ the weekend.
- And although I thought I would have to borrow same books, in the end this wasn't necessary.
(borrow) __________________________ any books.
- 4. But I gave up a lot of my spare time when I didn't have to!
(give) ___________________________ so much of my spare time.
- 5. I spent a lot of time reading and writing every evening.
(spend) _____________________________ reading and writing every evening.
- But I managed to do it on my own, and I didn't ask for any help.
(ask)__________________________ any help.
- And I didn't give up playing tennis.
(play) __________________________ tennis.
- I spent a lot of time using the Internet unnecessarily.
(use) ___________________________ so much.
- But it was quite easy in the end, and I did it without thinking too hard!
(think) ___________________________ too hard.
- In the end, I worried about it a lot, but this wasn't necessary!
(worry) ________________________ it so much.
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