has to 的反义疑问句怎么样做?Emma has to stay at home to look after her little sister ,doesn't she?的原因是什么?为什么不用hasn't she？has to 不是情态动词吗？

来源：学生作业学帮网 编辑：学帮网 时间：2024/06/06 10:14:44

has to 的反义疑问句怎么样做?
Emma has to stay at home to look after her little sister ,doesn't she?的原因是什么?
为什么不用hasn't she？has to 不是情态动词吗？

这里用的是have to 的短语,只充当一般动词的作用,助动词为do,does,和普通的一般疑问句没有任何差别,提问当然还是用do,does引导.
只有当用have,has做助动词的时候,疑问句才用它们引导,如：she has seen it,hasn't she?这里的助动词就是has（而上面的那个has to 只相当于这里的seen）

have(has ,had) to do 必须，不得不
一般把这里的"have"理解为实义动词，变反意疑问句时要用"do"的相应形式

因为这里的 has 并不是现在完成时中的 助动词。
这个句子你要认真看，它只是一般现在时而已， has to 是必须，不得不的意思。
看得出，这个句子没有be动词，要借助助动词，所以就是 doesn't she
前面是否定，后面就是肯定。这个相信你知道。
懂了吗？
以后看这种题目，要看清楚，不可一看到 have/has 就想到是完成时哦……
加油！<...

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因为这里的 has 并不是现在完成时中的 助动词。
这个句子你要认真看，它只是一般现在时而已， has to 是必须，不得不的意思。
看得出，这个句子没有be动词，要借助助动词，所以就是 doesn't she
前面是否定，后面就是肯定。这个相信你知道。
懂了吗？
以后看这种题目，要看清楚，不可一看到 have/has 就想到是完成时哦……
加油！
希望采纳~~

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