英语语法:名词作时间状语是什么语法点?:例1:I did have a girlfriend a while back
英语语法:名词作时间状语是什么语法点?:例1:I did have a girlfriend a while back at high school.
例2:I passed CET-6 three years ago.
例1可能我改得错了
原句对话是
A:Do you have a girl friend?
B:I did a while back at high school.
这里a while是做宾语吗?back是什么词性,修饰什么。