Before he___(leave)school,he cleaned the classroom

问题描述:

Before he___(leave)school,he cleaned the classroom
为什么呀

left
意思是他打扫了教室后就离开了学校
其实这里要注意的是before的用法,多翻翻字典啦,关于before的用法,考试经常用到的,出题范围也很广,掌握了就不怕的了,不然很棘手的~