We___for her because she never came.A.shuldn't had waited B.shuldn't have waited为什么?

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We___for her because she never came.A.shuldn't had waited B.shuldn't have waited为什么?
We___for her because she never came.A.shuldn't had waited B.shuldn't have waited
为什么?

We___for her because she never came.A.shuldn't had waited B.shuldn't have waited为什么?
选B
should have done表示本应该做而没有做
should not have done 表示本不该做而做了
再者should后面当然要接动词原形了,不会是had

B.shuldn't have waited

A.shuldn't had waited (虚拟语气的标准格式)