needn't 和 don't need to 有什么不同?
来源:百度知道 编辑:UC知道 时间:2024/05/10 13:04:55
need作为情态动词时否定形式是needn't ,后面只能跟动词原形;need做实意动词时否定为don't need 1,to后面用动词原形,因为to不定式嘛2后面可以跟名词/代词,表需要。
needn't need为情态动词
don't need to do need为实意动词``
need't后面可以加名词
don't need to必须加动词原形`
needn't 也可以回答must的疑问句。
needn't中的need为情态动词
而don't need to do中的need为实意动词,do为助动词
前者的need是个情态动词.后面的need 是实
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