gạch chân các dấu hiệu nhận biết của các thì

16. _________ you understand what he said?

A. Can B. Could C. Will be able to

17. I don’t think he _________ win the next competition.

A. can B. could C. will be able to

18. Listen! We _________ hear a train in the distance.

A. can B. could C. will be able to

đặt câu với thì Will be able to ( câu khẳng định,câu phủ định , câu nghi vấn )

11. Peter ________ play tennis last Monday: he had broken his arm!
12. When Ann was teenager, she ________ watch a horror film: it was too frightening for her!
13. Last Sunday, we ________ take any photos in the museum: it was forbidden.
14. Mozart ________ play the piano when he was 5.