什么时候do you know可以用I didn't know回答

问题描述:

什么时候do you know可以用I didn't know回答
为什么前面是一般现在时,后面是一般过去式

在有些情况下(比如之前不知道)do you know (现在时) 可以用 I didn't know (过去式) 回答,请看例句:John:Do you know,Mary just got married?Michelle:No,I didn't know.When did that happen?也希望点击“选...