Question

they arrived as we were leaving.

九年级英语题~
They arrived _______ we were having dinner.
A.when
B.during
C.while
D.as
给讲一下谢谢

Answer 1

when 当……时候
during 在……期间
when 一般突出“突然的”意思
while 一般指同时发生的事情 例如：
I was playing PC while he was looking TV
一般用现在时
when的使用范围很广,各种情景均可使用.
while强调两个动作同时进行.
while还可表转折,这点恰恰是试题中常见的.
给个例子：I was doing my homework,while he was watching TV in the sofa.
as ……和…… 一样
选择 A:when