I didn't go to bed last night _______ my parents came back.A.while B.when C.after D.until
问题描述：
I didn't go to bed last night _______ my parents came back.A.while B.when C.after D.until
I didn't go to bed last night _______ my parents came back.
A.while B.when C.after D.until
我想问问为什么不能用B啊,这样不就成了“昨晚我的父母回来时我还没有睡觉”了吗?
答
when在这里和while的意思一样,是当的意思.
当我父母回来时我没有睡觉,语法上不通,通常是说当我父母回来时我在睡觉.
否定的时候用until比较顺畅,而且not...until...是固定搭配.