11.   Tom injured his shoulder playing tennis.

12.   We had planned to play tennis but since it was raining we Decided to go swimming instead.

13.   Why would you want to play tennis in a hundred-degree heat?

14.   You can work up a really big thirst playing tennis.

15.   Next to soccer, I like playing tennis best.

16.   I play tennis to keep trim.

17.   She plays tennis thrice weekly.

18.   He pulled a muscle playing tennis.

19.   He was unable to play tennis after the injury.

20.   Prepared either to swim or play tennis, she packed her shoes and racket, towel and suit and a pair of shorts and a shirt.