Вставить модальный глагол to have to в предложения Mary....go to school by bus,so she leaves home at 8 o'clock. Yesterday

Модальный глагол to have to в прошедшем времени имеет форму had to, в настоящем - has to (he, she, it) или have to (I, we, you, they), в будущем – will have to.

Mary has to go to school by bus, so she leaves home at 8 o\'clock. Yesterday I had to get ready for my English exam. Last week my friends will have to stay at school after classes. Tomorrow he will have to go to bed at 9 o\'clock.