1704964980
When she’ll be back depends much on the weather．她什么时候回来在很大程度上取决于天气。
1704964981
1704964982
It all depends on when we can get the tickets．这得看我们什么时候能拿到机票。
1704964983
1704964984
有时可引导一个不定式短语：
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1704964986
Ask him when to open it．问他什么时候把它打开。
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1704964988
You’ll learn when to use that construction．你会知道什么时候使用这种结构。
1704964989
1704964990
（2） when可用作连词，表示“当……时”：
1704964991
1704964992
Don’t get excited when you talk．谈话时别激动。
1704964993
1704964994
I will discuss this with you when we meet．我们见面时再谈这事。
1704964995
1704964996
When he got up he felt dizzy．他起床时感到头晕。
1704964997
1704964998
Herbert was having dinner when I saw him．我看到赫伯特时他正在吃晚饭。
1704964999
1704965000
When he looked back, the girl had vanished．他回头望时那姑娘已经不见了。
1704965001
1704965002
从句中有些成分有时可以省略：
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1704965004
He got engaged to her when travelling last winter．他去年冬天旅行时和她订了婚。
1704965005
1704965006
Metals expand when heated and contract when cooled．金属热则膨胀冷则收缩。
1704965007
1704965008
Often she would weep when alone．她一人呆着时常常哭泣。
1704965009
1704965010
When at Rome do as the Romans do．入乡随俗。（谚语）
1704965011
1704965012
在某些情况下可有特殊的译法：
1704965013
1704965014
I was just coming along to see you when I ran into Wilson．我正要来看你时碰到了威尔逊。
1704965015
1704965016
I had not been reading for half an hour when I heard steps outside．我看书还不到半小时就听见外面有脚步声。
1704965017
1704965018
Why are you here when you should be in school？你本该上学的，为什么在这里？
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1704965020
Why do you walk when you have a car？你有车为什么还步行？
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1704965022
（3）when还可用作关系代词引导定语从句：
1704965023
1704965024
There are moments when I forget all about it．有的时候这事我全忘了。
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1704965026
At the time when I saw him, he was well．我见到他时他还是好好的。
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1704965028
There are times when such things are necessary．有时候这样做是必要的。
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