(1)be doing sth. when… 表示“正在做某事就在这个时候发生了另外的一件事” 。
(2)be about to do sth. when… 表示“正要做某事就在这个时候发生了另外一件事”。
I was about to leave when the phone rang.
我正要出去就在这个时候电话响了。
I was walking in the street when I heard my name called from behind. 我正在街上散步就在这时我听到有人在背后叫我的名字。
Professor Wang will come for a visit to our school in May when he will give away his works to our library.
王教授将在5月份访问我校,届时他会把他的著作捐赠给我校。
when除了引导时间状语从句外,它还能引导哪些状语从句呢?
(1)How can he learn anything when he has spent all of his spare time surfing the Internet playing computer games?
(2)They kept digging when they must have known there was no hope.
(1) 引导原因状语从句,表示“既然”。既然他把所有的业余时间都用在上网玩游戏上了,他又怎能学到什么呢?
(2) 引导让步状语从句,表示“尽管”。他们明明知道没任何希望,但他们还是不停地挖。
11、Although its origin may still be a puzzle, the moon can never be anything more_than a satellite of the earth.(P28)
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