Complete the sentences with can, can’t, could or couldn’t.

1 When he was young, my grandfather ...................... (run) 12 kilometres.

2 John can’t run very fast but he ...................... (jump) high.

3 ...................... you ...................... (finish) your homework last week?

4 The dog hurt its leg and it ...................... (walk).

5 ...................... Tony ...................... (find) his way to the party tonight?

6 Sorry I ...................... (not help) you paint your house yesterday.

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