when后面be动词的用法
When + be 动词+其他?
询问时间 :When is your birthday? When is your mother’s birthday? Joe, when is the school trip?
when表示前面的叙述所没有提到过的信息。它总是对所描述的事件予以引人注目的强调,意为“这时突然”。
如:
1) He was still smiling when the door opened and his wife came in.
他正笑着的时候,门突然开了,他妻子走了进来。
2) I was thinking of this when I heard my name called.
我正想着这件事时,突然听到有人叫我的名字。
3) We were about to start when it began to rain.
我们刚要出发就开始下雨了。
when的用法句型
1.be doing sth…when…
例:He was still smiling when the door opened and his wife came in.
他正笑着的时候门突然开了,他妻子走了进来。
2.be about to do sth…when…
例:We were about to start when it began to rain.
我们刚要出发,天就开始下雨了。
3.had not done sth…when…/hardly…when…
例:He had not fallen asleep when the telephone rang.
他刚要入睡电话就响了。
4.had just done…when…
例:I had just gone to bed after a very hard day when the phone rang. 在劳累了一天之后我刚刚就寝,电话铃就响了。
when后面be动词的用法
看句子的主语和when引导的时间状语从句的时间状语。如果是一般现在时,be动词可能是am is are,如果是过去式可能是was, were,如果是一般现在时可能是has/have been。