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1 Could 7 Correct the mistakes in these sentences using may, might, can or could.

Example: It was a bad accident. We can have been killed.

  1. They can be going to increase airport fees to pay for increased security.

  2. Don't turn off the computer yet. Someone can still be using it.

  3. In late 18th century Scotland, you may be hanged for stealing a sheep.

  4. These people can have a lot of money, but it doesn't make them interesting.

  5. By Friday I can have finished the book, but if I get too busy, I can not.

  6. May someone tell me where the main office is?

  7. We know he doesn't tell the truth, so we really might not believe any of his stories.

  8. He asked me last night if you may be willing to talk to Margaret for him.

  9. According to the forecast, the weather can be a bit warmer today. 10 This switch isn't working. May the children have broken it?

Necessity: must, have to, have got to, need to, needn't

18 Using a dictionary if necessary, complete the sentences with these words and appropriate forms of must or have to.

command duty-free evil extra fruit obligation step taboo

  1. An optional……….….….in a new car is something that is available, but you…..…….…get it.

  1. An essential is a part of a procedure you'll do in order for it

to be successful.

  1. Forbidden is something that you touch or have, even

though you really want it.

  1. In the army, soldiers always obey a given by a senior officer.

  2. If you are under no to do something, you do it.

  3. When you buy things that are , you pay tax on them.

  4. If a topic is in a particular culture, it means that you talk

about it because it is considered offensive.

  1. A necessary is something you don't like or want, but which you may

accept in order to achieve your goal.

19 Complete these sentences with the verbs and adjectives.

didn't have to must need to allowed official significant

having to mustn't needn't have impossible required unnecessary

  1. I wear a jacket and tie last night. Formal attire was not

  2. You made so much noise. All that shouting was quite

  3. People have dogs in their rooms. Pets are not in the hotel.

  4. You won't fill in forms. All the paperwork will be complete.

  5. Not pay to use the pool is a benefit of being a student here.

  6. Everyone have a valid passport because it will be to enter

the country without one.

20 Correct the mistakes in these sentences.

  1. We have already washed all the dinner dishes so you mustn't clean them tonight.

  2. Everyone will have got to go through metal detectors every time they enter the building.

  3. I'll need get some aspirin because I've got a terrible headache and I have to keep working.

  4. The part that broke is a crucial component and I must to find a replacement immediately.

  5. Whenever service is included in a bill, customers needn't to leave a tip for the waiter.

  6. Our train arrived rather late and so we had got to take a taxi to get to our meeting on time.

  7. I don't want to be the one to must have to tell him that he failed the entrance exam again.

  8. I'm sure you don't need be over twenty-one to go into a pub here, but we must ask someone.

  9. When we stayed with my grandmother, we must go to church with her every Sunday.

  10. We didn't know that our friends had already gone into the theatre so we needn't have to wait all that time for them outside in the cold.

Deduction: must, have to, have got to, can't and couldn't