Помогите поставить предложения в правильное время. ( в положительной, отрицательной и

Помогите поставить предложения в правильное время. ( в положительной, отрицательной и вопросит. формах, т.е. к каждому предложению по 3)
1. Mary (to have) 5 lessons every day.
2. Dan (to leaving) his office this time tomorrow.
3. I (to bring) already a lot of presents.
4. We (to drive) to Athens in the morning tomorrow.
5. My Mum (to leave) just that building.
6. Carol (to begin) her speech before we came.
7. Nelly (to sing) some nice songs by the time of our arrival.
8. They (to find) their key by 7 a.m.tomorrow.
9. Our son (to make) his speech by this time tomorrow.