needn't与don't need to怎么用,两者有没有什么被动语态之类的关系?

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needn''t与don''tneedto怎么用,两者有没有什么被动语态之类的关系?needn''t与don''tneedto怎么用,两者有没有什么被动语态之类的关系?needn''t与don''tneedto怎

needn't与don't need to怎么用,两者有没有什么被动语态之类的关系?
needn't与don't need to怎么用,两者有没有什么被动语态之类的关系?

needn't与don't need to怎么用,两者有没有什么被动语态之类的关系?
needn't中的need是个情态动词,所以它的后面应该加动词原形.
don't need to中的need是实意动词,所以应该跟need to do sth.的词组.

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need有两种词性
1.情态动词.用法和can一样后面直接跟动词原形.情态动词否定是后面直接加not, 所以needn't是情态动词.无被动语态.
举例.你不需要向他请求帮助.

You needn't ask to him for help.
2.实义动词.就是我们经常用的like, wash , play等动词.具有实际意义.
所以在否定时前面得加助动词，也就是前面得加don't,didn't啊之类的，看时态.
一般用法是 need to do sth.
你需要休息一下. You need to take a rest.
你不需要休息. You don't need to take a rest.
但是需注意的是表被动时用need doing来表示.
比如你的自行车需要修理.因为车子是被修理.是被动
Your bike needs repairing.

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don't need,needn't 的区别 don't need 等不等于 needn't needn't to come,don't need come,don't need coming与needn't come的区别 don't need to 与 don't have to、needn't 的意义相同吗 don't need to do 与needn't do 有什么区别?还有needn't 是否只能用于一般现在时? needn't 和 don't need 的区别 needn't 和 don't need to 有什么不同? don't need 和needn't 有什么区别啊? needn't和don't need的区别和用法? don't need 和 needn't 有什么区别? needn't don't need它们的区别 We ________much sleep.(don't need,needn't) you _____pay for the book if you _____itA don't need to ;needn't B don't need ;don't need C needn't ;needn't D needn't ;don't need 英语翻译为什么用needn't而不用don't need, 什么是行为动词,什么是情态动词.don't need与needn't 什么是行为动词,什么是情态动词.don't need与needn't needn't与don't need的区别什么时候用前者,什么时候用后者? needn't sth与don't need sth有什么区别?