needn't与don't need有何区别?请写几个例句.并说明区别我要例句！

来源：学生作业帮助网编辑：作业帮时间：2024/05/05 16:31:30

needn't与don't need有何区别?请写几个例句.并说明区别我要例句！
needn't与don't need有何区别?
请写几个例句.并说明区别
我要例句！

needn't与don't need有何区别?请写几个例句.并说明区别我要例句！
是这样的,needn't do 和 don't need to do 两者有些差别.
就像needn't have done 和 didn't need to do 一样.
从用法上,前者是情态动词,后者是实义动词.
从意义上,前者暗示已经做了,有“本不需要”的意思,后者暗示还没有做,就是纯粹地“不需要”.
如：You needn't do the housework.(说话时你已经做了家务)
You don't need to do the housework.(说话时你尚未做家务)

needn't 的need是情态动词
don't need 的need 是实义动词

前者的Need是情态动词
后者是行为动词

情态动词
实义动词

没有区别。
前者need是情态动词，后者是一般动词。
前者直接＋名词或动词，后者＋to do或名词。
I needn't have a break=I don't need to have a break.
我不需要休息。

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