Ответ:

1.I didn't do this exercise two years ago.

2.You don't never see a horse

3. is he ever ride a bike?

4.He is just say that

5. we didn't went to school yesterday

6. they don't have breakfast yet

7. did you hear this song last week?

8. I am never to the USA

9. tom is wrote a letter to Nick five days ago

10. his father is came back to London last Sunday