3предложения с 1 - finish, 2 - finished, 3 - finished, и 3 предложения - 1 - с forget, 2 - forgot, 3 - forgotten.

I usually finish my homework at 8 pm.
He finished his work at 9 pm.
I have already finished my task.
I usually forget my friend`s surname.
My friend forgot his keys at home.
I haven`t forgotten to write to her yet.