when did he leave here do you know?合并成宾语从句怎么改

问题描述:

when did he leave here do you know?合并成宾语从句怎么改

do you know when he left here?

Do you know when he left here?
宾语从句要用陈述语序。

Do you know when he left here?这是个宾语从句,when这整句都是know 的宾语.简单点,就是“知道”的对象、

Do you know when did he leave here?