№ 3. поставьте предложения в отрицательную и вопросительную формы.

e.g he has to revise the whole material.

does he have to revise the whole material?

he doesn’t have to revise the whole material.

1. she has to do these exercises again.

2. we had to work hard to learn how to solve such problems.

3. he’ll have to answer her letter without any delay.

4. you have to speak louder to make yourself heard.

5. they had to repeat the experiment.

6. i’ll have to work from morning till night to earn my living.

7. she’ll have to give a talk at the seminar.

8. we had to change the plan.