needn't do和 didn't need to do的区别The students ______ to school yesterday as the local government announced that all the school classes were to be canceled due to the terrible typhoon.A didn't need to go B needn't go但是AB都表示不必做,而且都没有做过.B为什么不对?
问题描述：
needn't do和 didn't need to do的区别
The students ______ to school yesterday as the local government announced that all the school classes were to be canceled due to the terrible typhoon.
A didn't need to go B needn't go
但是AB都表示不必做,而且都没有做过.B为什么不对?
答
A didn't need 表示“过去不必”
B needn't go 表示“将来不必“
此题中，有时间状语”yesterday“，因此要用过去式，故选A
O(∩_∩)O哈哈~ 我回答得不错吧!
答
A选项中的need是实意动词，B中的是情态动词。need做情态动词时是真对将来而言。此处显然是说过去的某件事没有必要，故选A.
答
A didn't need 表示“过去不必”
B needn't go 表示“将来不必“
此题中,有时间状语”yesterday“,因此要用过去式,故选A