when的用法四種句型:be doing sth…when;be about to do sth…when;hardly…when;had just done…when。
1、be doing sth…when
例:He was still smiling when the door opened and his wife came in.
他正笑着的時候門突然開了,他妻子走了進來。
2、be about to do sth…when…
例:We were about to start when it began to rain.
我們剛要出發,天就開始下雨了。
3、had not done sth…when…/hardly…when…
例:He had not fallen asleep when the telephone rang.
他剛要入睡電話就響了。
4、had just done…when…
例:I had just gone to bed after a very hard day when the phone rang.
在勞累了一天之後我剛剛就寝,電話鈴就響了。
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