had better是情态动词吗?他的否定和疑问句如何构成?如题

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had better是情态动词吗?他的否定和疑问句如何构成?如题
had better是情态动词吗?他的否定和疑问句如何构成?
如题

had better是情态动词吗?他的否定和疑问句如何构成?如题
是情态动词
hadn't better
had +主语＋better
Had better意为“最好”,后接不带to的不定式.如：
— We had better go now.
— Yes,we had (we'd better / we had better).
Hadn't we better stop now?(Had we better not stop now?)
I think I'd better be going.（用于进行时态,表“最好立即”）
You had better have done that.（用于完成时态,表未完成动作）
注：①had best与had better同意,但较少用.②You had better … 用于同辈或小辈,对长辈不可用.
3.Would rather意为“宁愿”,表选择,后接不带to的不定式.如：
I'd rather not say anything.
Would you rather work on a farm?
— Wouldn't you rather stay here?
— No,I would not.I'd rather go there.
由于would rather表选择,因而后可接than.如：
I would rather work on a farm than in a factory.
I would rather watch TV than go to see the film.
I would rather lose a dozen cherry trees than that you should tell me one lie.
I'd rather you didn't talk about this to anyone.（句中的'd rather不是情态动词,would在此是表愿望的实义动词）

(1)You are(be) a student.
否You are not a student.
问Are you a student?
(2)You can do it.
否You can not do it.
问Can you do it?

请问had better是情态动词吗 had better是情态动词吗?他的否定和疑问句如何构成?如题 you had better be careful.had better 的词性是情态动词,be careful词性是名词,情态动词后可以跟名词吗? had better前能否用情态动词情态动词后的否定都用not吗情态动词的否定式后跟什么? had better的否定式是什么? let's 必须后要用动词原形吗?had better 也必须用动词原形吗?had better 是 haver better的过去式吗? 情态动词是助动词的一种吗? 1.we had better be careful.为什麽这里用be,而不是are?是因为had better 是情态动词,所以後面要跟be原型吗?be是am, is, are,的原型?2.下面,用a和one都对吗?one thousand pounds,a thousand poundsone thousand miles ,a thousand (100分)（急）跪求英语语法题目解答.学哥学姐请分析为什么要这样选,把涉及到的语法知识说下You had better not smoke here,Had you.?我知道had better 是固定用法,从had和not可以判断出had是情态动词或助实义动词的否定式是前面加助动词dont＋动词,而情态动词是后面直接加not?这是为什么? must是情态动词吗? would...是情态动词吗? need是情态动词吗 should是情态动词吗? can是情态动词吗? may是情态动词吗?