Можно 5 предложений past simple, past perfect, past continuous, present perfect, present continuous, present simple. надо взять одно предложение и менять его . т.е. 5 одинаковых предложений менять на разное время.

Предложения:
1)Past Simple: I DID my homework.
2)Past Continuous: I WAS DOING my homework.
3)Past Perfect: I HAD DONE my homework.
4)Present Perfect: I HAVE DONE my homework.
5)Present Continuous: I AM DOING my homework.
6)Present Simple: I DO my homework.