1. reliable 2 untidy 3 impatient 4 cheerful 5 optimistic 6 generous 7 unsociable 8 ambitious

2. 1. They can't be at home.

2. He must be her son

3. It could be under the bed

4. It might be the neighbour's

5. She must be practising for her exam

6. They can't be retired

7. It could be from William

8. They might be having lunch

3. 1. They must have our money

2. She might/could arrive this afternoon

3. They can't be brother and sister

4. He might/could be Spanish or Italian

5. He can't be the new manager

6. She must be in the office

7. The bag might/could belong to Helen

9. It must be his fault

4. 1. They might have had an argument

2. You must have been frightened.

3. You can't have finished already

4. She can't have seen you

5. They must have played badly

6. They could have won the lottery

7. They might have had bad weather

8. You could have left it at school

5. (possible answers)

1. They might have gone to the wrong gate.

2. She must have passed her driving test

3. They might have heard a joke

4. He might have lost his job

5. He must have fallen in the river

6. She might have spoken to her boyfriend

6. 1. So am I! 2. I don't! 3. Neither do I! 4. Neither can I! 5. I can! 6. I'm not! 7. I haven't! 8. So do I!

7. (possible answers)

1. My leg was plaster and I had to use crutches.

2. She can't be related to him. I think she might be this teacher.

3. A My mother-in-law has never been a reliable person

B Neither has mine

4. A I think your grandma must have been a very sociable person since she had so many friends

B So do I.

5. He couldn't have been driving the cat which the oak tree feel on. He can't drive

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