EnglishClub ESL Forums

Which are correct:

1) You have to be careful about cheating. Some of your students might cheat.
2) They have to be careful about stealing. Some of their costumers might steal books from their bookstore.
3) They have to be careful about stealing books. Some of their costumers might do it.

In these sentences the subject of the first sentence is not the one cheating/stealing.

Gratefully,
Navi

All are grammatical.

In (3), however, 'they' are the implied agents of the theft.