Complete the sentences with the correct form of the words in brackets. do not change the order of the words in brackets.

1 Mum, could you (teach/I/play) chess?
2 Our father (never/let / we / go) swimming in the river.
3 The doctor (warn / she / not/do) too much exercise during the first month after the injury.
4 A friend of hers said, "(not/waste/time /try) become a professional sportsperson!"
5 Joshua (attempt / climb) the highest mountain in the Alps two years ago.