didnt see your sister at home.if she ____,she would have met

来源：学生作业帮编辑：搜搜做题作业网作业帮分类：英语作业时间：2024/08/08 18:18:41

didnt see your sister at home.if she ____,she would have met me.
A has come B did come C had come
答案为什么是C
请说理由
另外B为什么不可以,did come我不可以理解为确实来了嘛..

记住一个规则,主将从现即为主句将来时从句现在时态
相应的主句过去时态从句过去完成时
而且这里的HAD COME是对于过去时态的虚拟语气
即为如果她来了（对于过去时段的虚拟）她会碰到我
B是对于过去状态的强调
did come 如果她确实来了
但是此处只是对于过去时段的虚拟假设（假设她来了她肯定碰到我了）所以不可能是确定的语气
所以不是B

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