如题所述
Have to是情态动词 ,意思是“必须、 不得不”。have to的三单形式是 has to 。
I have to stay at home .
我不得不呆在家。
My mother has to get up early.
我妈妈不得不起床早。
have to /has to 的否定句分别在have to 或has to 前加don't 或doesn't.
一般疑问句在句首加do或does。
例如:
1. They have to go to Shanghai. 他们不得不去上海。
否:They don't have to go to Shanghai.
一般疑问句:Do they have to go to Shanghai?
Yes, they do.
No, they don't.
2. Tom has to study hard. Tom 不得不努力学习。
否:Tom doesn't have to study hard.
一般疑问句:Does Tom have to study hard?
Yes, he does.
No, he doesn't.
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