when,while,before,after+________
when,while,before,after+________
while after before when
I arrived at the airport ________(after/while/when/before))
用after、 before 、if 、when、 while 、as soon as 填空
when,until,after,while,before,because个造一个句子
while,when,until,after,before,as soon as 怎么用?
when while before after as soon as until填空
一.选用before,after,until,while,when,as填空
用when,while,as soon as,until,before,after填空
when,while,as soon as,before,after的区别
英语语法,before when\after when
如果句子里有 when before while after这些词语都是时间状语吗