needn't do和don't need to do有啥区别

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needn''tdo和don''tneedtodo有啥区别needn''tdo和don''tneedtodo有啥区别needn''tdo和don''tneedtodo有啥区别是这样的,needn''tdo和don''

needn't do和don't need to do有啥区别
needn't do和don't need to do有啥区别

needn't do和don't need to do有啥区别
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