Заполните пропуски словами: can, can‟t, could, couldn‟t, to be able to:

1. I‟m afraid I _______ help you at the moment.

2. I don‟t think I‟ll _______ come to the meeting.

3. The negotiations broke down because we _______ agree on the price.

4. I _______ see you were having problems, so I didn‟t interrupt.

5. If you _______ make a firm order today, we should _______ ship by Friday.

6. I find Portuguese very difficult. I _______ understand it, but I _______ speak it.

7. Sorry, I _______ see you next week, but I might _______ make the week after.

8. A: Will you _______ go to the training seminar?

B: No, I _______ – I‟m very busy.

9. I‟m sorry I _______ come to your talk yesterday. I had to sort out a problem.

можно правило, по которому вы это определяете?

https://www.englishclub.com/grammar/verbs-modals-can-could-able.htm

1. cant2. be able to3. couldnt4. could5. can, be able to6. can, cant7. cant, be able to8. be able to, cant9. couldnt