1.while 这里表示在一个⋯⋯的过程中
在巴士开动的过程中不要上车／下车.
2.if 好像是句蛮有哲理的话：所有简单的事情（从某种角度上来说）都是难的.
3.before 我们在下周碰面是未来的事情
4.when 这里是一个时间点
有问题再问.
望楼主采纳.
用after、 before 、if 、when、 while 、as soon as 填空
5个回答
相关问题
-
when while before after as soon as until填空
-
用since,as,when,as soon as,while,if,after,before,until或becaus
-
when,while ,until,till ,as soon as ,as ,after ,before,引导的时间状
-
as soon as ,since,while,when,befor until有什么区别
-
when,shile,as soon as,until,after,before的区别
-
when. before. while. unitl. since. after. as
-
英语造句（状语从句）用when,while,as,as soon as,not……until,until,after,b
-
as soon as since when while区别
-
as soon as ,when,while 什么区别
-
while,as soon as,when的区别