![](https://img.haomeiwen.com/i22411277/dd4e56e86ee46ba9.jpg)
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。
(1) 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。
(2) 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。
(3) 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。
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