утверждение просто напишу, как правильно глаголы поставить:
1. drank
2,4, 5, 6. was
3. had
в утверждение всё так и остается, просто надо глаголы в такой форме поставить.
отрицание:
1. They did not drink tea every day.
2. Mike was not a student.
3. Helen did not had a car.
4. You was not a good friend.
5. You was not friend
6. it was not difficult to remember everything.
Вопросы:
1. Did they drink tea every day?
2. Did  Mike was a student?
3. Did Helen had a car?
4. Did you was a good friend?
5. Did you was friend?
6.  Did it  was difficult to remember everything?