请告诉我have to是不是情态动词

是情态动词
1 have to的用法
I have to get up early tomorrow morning.
我明天早晨必须（不得不）早起.
1.have（has）to +动词原形
have（has）to后面要用动词原形.当主语为第三人称单数时用has to～,当句子是过去时用had to～.
We have to leave now.
我们不得不现在就离开.
He has to work on Sunday.
他不得不在周日工作.
I had to do my homework last Sunday.
上周日,我不得不做作业.
2 have to的否定句
句型：主语+don''t（doesn''t）have to+动词原形～.
You don''t have to walk so fast.
你不必走那么快.
He will not have to buy a new coat next year.
明年,他没必要买新外衣了.
3 have to的疑问句
句型：Do（Does）+主语+have to +动词原形～
Do you have to study maths now?
你现在必须学数字吗?
Yes,I do.是的,必须学.
No,I don''t（have to）.不,不必学.
Did he have to ask the question?
他非要问那个问题吗?
Yes,he did.是的.
No,he didn''t（have to）.不.

是

是,但是它也有时态变化

是情态动词

是