用when,while,as soon as,until,before,after填空

题目

用when,while,as soon as,until,before,after填空
Don't go to sleep _____ you finish your homework.
The children are dancing _____the band is playing.
_____ he came home,I told him about that.
You must wash your hands _____ you eat something.
____he left there,he went to Beijing.
说明原因喔

答案

Until - 功课做完之前不可以睡觉 （until.= 一直到.的时候）While - 乐队在演奏的同时 孩子们在跳舞 （when 指一特定的时间点,while 是指一段持续的时间） 这句也可以翻成：＂乐队在演奏,而孩子们正在跳舞＂——注意...