作业帮You _______ to the meeting today if you have something important to do.A.needn't to come B.don't need come C.don't need comingD.needn't come为什么不选A?不是need to do/don't need to
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You _______ to the meeting today if you have something important to do.A.needn't to come B.don't need come C.don't need comingD.needn't come为什么不选A?不是need to do/don't need to
You _______ to the meeting today if you have something important to do.
A.needn't to come
B.don't need come
C.don't need coming
D.needn't come
为什么不选A?不是need to do/don't need to
You _______ to the meeting today if you have something important to do.A.needn't to come B.don't need come C.don't need comingD.needn't come为什么不选A?不是need to do/don't need to
need 两个词性 1 情态动词 2 实意动词
作情态 否定need+动词原形
做实意 need to do 这里 否定是 don't need to do
need如果用needn't，那这里的need表示为情态动词，则情态动词后面不加to,所以A本身就是一个错误的形式，don't need to 里的need为动词，故，后面加to，由此排除，选D
need 当作为情态动词时，则need do something, 其否定形式是need not do something
当作为实义动词时，跟一般动词用法一样，即 need do do something, 其否定形式要借助于do, 即 don't need to do something
need在这里是情态动词，和can,must一样用法，没有时态区别、没有助动词
need也可以用作实意动词，就是一般的动词，后面加to do sth 这个时候，有时态区别，有助动词do 或者does
句子中的A后面有to说明是实意动词，那么否定应该是dont need to come
need to do /don't need to do sth need 是实义动词。否定形式借助于do
need do/needn't do need是情态动词。否定时自身接not