而“have to”要加助动词do , does或

　　did才可能完成其疑问、否定句。

　　试将下面三种话分别写成

　　（1）一般疑问句，并做肯定回答。

　　（2）否定句。

　　a. They have to go to the party.

　　Do they have to go to the party?

　　Yes, they do.

　　They don’t have to go to the party. b. He has to go to see the doctor. Does he have to go to see the doctor? Yes, he does.

　　He doesn’t have to go to see the doctor.

　　c. She had to have a piano lesson yesterday.

　　Did she have to have a piano lesson

　　yesterday?

　　Yes, she did.

　　She didn’t have to have a piano

　　lesson yesterday. 2. I have to help my parents.

　　我不得不帮助我的父母。 help sb. with sth. 或help sb. (to) do sth.

　　上一句我们可以说：

　　I have to help my parents with the

　　housework.

　　或说I have to help my parents (to) do the housework. 3.That’s too bad. Maybe another time.

　　太糟了，也许换个时间吧。

　　或Maybe next time.

　　也许下一次吧。 书面表达 　

　　下周六是你的生日，你打电话请同学们来参加你的生日聚会，写一段电话会话。 Homework

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