Can, could, be able to: Ability and possibility — Exercise 1
Select the right form of can, could, or be able to (positive or negative). You should only use a form of "be able to" if you can't use a form of "can" or "could."
1When I was five, I swim very well.
2I’m sorry, I hear you. The music is too loud.
3After months of training, she run a marathon last year.
4I hope I finish the project by tomorrow.
5There’s someone at the door. It be the postman.
6He was very tired, but he complete the task on time.
7I’m afraid I come to your party tonight.
8She speak three languages fluently.
9We looked everywhere, but we find the keys.
10If you practise more, you improve your pronunciation.