Unit 37. I am /I don't etc.


She isn't tired but he is. (he is = he is tired)	He smokes but she doesn't. (she doesn't = she doesn't smoke)

am/is/are was/were have/has do/does/did

can will must may might would should

We use these verbs with other verbs (am going / has seen / can't come etc.) but you can also use them alone:

- I haven't got a car but my sister has. (= my sister has got a car)
- ‘Please help me.’ ‘I'm sorry, I can't.’ (= I can't help you)
- ‘Are you tired?’ ‘I was, but I'm not now.’ (= I was tired but I'm not tired now.)
- ‘Do you think Ann will come?’ ‘She might.’ (= She might come.)
- ‘Are you going now?’ ‘Yes, I'm afraid I must.’ (= I must go)

You can use these verbs in this way with Yes … and No …:

- ‘Is it raining?’ ‘Yes, it is. / No, it isn't.’
- ‘Have you ever been to Canada?’ ‘Yes, I have. / No, I haven't.’
- ‘Will Alan be here tomorrow?’ ‘Yes, he will. / No, he won't.’

Use do/does for the Present Simple:

- I don't like hot weather but Sue does. (= Sue likes hot weather)
- She works very hard but I don't. (= I don't work very hard)
- ‘Do you enjoy your work?’ ‘Yes, I do.’

Use did for the Past Simple:

- ‘Did you and John enjoy the film?’ ‘I did but John didn't.’
(= I enjoyed it but John didn't enjoy it.)
- ‘Did it rain yesterday?’ ‘No, it didn't.’

You cannot use the short forms 'm/'s/'re/'ve/'ll at the end of a sentence. Use the full forms am/is/are/have/will etc.:

- ‘Are you tired?’ ‘Yes, I am.’ (not ‘Yes, I'm.’)

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