前一个need 是 情态动词 跟can must 一样,后面必须接动词原形.后一个need是动词.这两个短语意思是一样的.
（1）you don't need to clean the house
(2) A:need I go to clean the house?(B) no,you needn't.
needn't 与don't need to的区别?
前一个need 是 情态动词 跟can must 一样,后面必须接动词原形.后一个need是动词.这两个短语意思是一样的.
（1）you don't need to clean the house
(2) A:need I go to clean the house?(B) no,you needn't.