need to do的否定为什么不可以是 need not to do否定在不定式?

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need to do的否定为什么不可以是 need not to do否定在不定式?
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need to do的否定为什么不可以是 need not to do否定在不定式?
need to do的否定为什么不可以是 need not to do
否定在不定式?

need to do的否定为什么不可以是 need not to do否定在不定式?
可以这样否定不定式
但这样是否定宾语 一般说否定一个动词短语 应该是否定动词 即:don't/doesn't need to do

need有两种用法,一种如 need doing 这时可在后面直接加not 一般表被动语态
还有就是need to do 那么否定就必须是don't need to do

need not do是正确的
【【need not可用于现在时和过去时。各人称的形式都一样。need not表示“无义务”。它表示说话人允许不去做某事,或仅仅表示某事并非必要:
Employer:You needn't make two copies.One will do.
雇主:你不用打印两份。一份就够了。
Give them this cheque.They...

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need not do是正确的
【【need not可用于现在时和过去时。各人称的形式都一样。need not表示“无义务”。它表示说话人允许不去做某事,或仅仅表示某事并非必要:
Employer:You needn't make two copies.One will do.
雇主:你不用打印两份。一份就够了。
Give them this cheque.They needn't send me a receipt.
把这张支票给他们。他们不用给我送来收据。
You needn't change(your clothes).Just come as you are.
你不用换(衣服)了。就穿着现在穿的衣服来吧。
must not表示否定的义务,即说话人叫你不要如何或是特别强调地劝告你不可如何:
You mustn't repeat this to anyone.
你不能把这件事告诉任何别人。
Notice in shop:Staff must not smoke when serving customers.
商店通告:工作人员在为顾客服务时一律不许抽烟。
You mustn't leave your car unlocked.This place is full of thieves.
你千万不能不锁车门就离开。这地方遍地是小偷。】】
谢谢啦。

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就像want to do的否定式只能是don't want to do

这里的need不是情态动词的用法了,而是行为动词,所以不能在上面直接否定。

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