we ___ for her beause she never came.A needn't wait B shouldn't have waited C mustn't wait D mustn'tA为什么不对,这时needn't后跟动词原形跟came是过去式 也没关系?
问题描述：
we ___ for her beause she never came.
A needn't wait B shouldn't have waited C mustn't wait D mustn'tA为什么不对,这时needn't后跟动词原形跟came是过去式 也没关系?
答
因为她是过去没来，所以用B shouldn't have waited ，不应该已经。
用A，时态都对不上，若改成needn't have waited 也行
答
B shouldn't have waited 表示本不应该做却做的事，是一种虚拟用法，need没有此种用法
答
B
不应该发生,但发生了.--------came是过去时.
若有needn't have waited,那就是首选了.