I didn't know you had come back 中的had come 不该用have came back

来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/04/27 18:51:34

I didn't know you had come back 中的had come 不该用have came back吗
I didn't know you had come back 和I don't know you have come back.意思是不是一样。感觉很少人说I didn't know.能说说在实际口语中的区别吗，还是说表达这个意思时，口语中会用其他的句子。

^^ 这里是完成时.come 的时态,come－came－come.
came是过去时态,最后的come才是完成时态.
当然是came咯.
意思为他已经回来了.
had 在这里是过去试.
=.=
i didnt know u had come back 就是过去式嘛,指的是我之前没知道你回来了.
Idont know u have come back 指的就是“现在”（双方正在谈话）我不知道你回来了.
其实你会区分 didnt 和 dont 就行了,一个是过去,一个是一般.
本人现居悉尼,日日跟老外打交道,没教错你的!

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