1 .许多状语从句可以有词省略，特别是在when , while , though , if , as if ( though ) ，等后面，省略的词多为它的主语和动词be :
Look out for cars when crossing the street .
过街时注意车辆。
She talked while preparing their supper .
她一面做饭一面谈着。
Though not large , the room was light and airy .
房间虽不大，却很亮堂，粗气清新。
If necessary , I'll have the letter duplicated .
如果必要我将把信复印一份。
She hurriedly left the room as if ( though ) angry ?
她匆匆离开了房间，好像生气了的样子。
This viewpoint , however understandable , is wrong .
这种观点，不管多么可以理解，都是错误的。
Whenever known , such facts should be reported .
这类情况一旦发现，就应当报告。
Fill in the blanks with articles where ( ever ) necessary .
在簌格中填入必要的冠词。
2 .在比较从句中，几乎经常会有字词省略：
Many Others are doing better than we are .
有很多人比我们干得好。
They were heavier than he had expected ，
它们比他预料的重。
Water was important to us as oxygen .
水对我们像氧气一样重要。
Working hard as usual , I expect .
还是和平时那样勤奋，我想。
3 .复合句中还有些其他成分可以省略：
Anything you want to take with you ?
有什么东西要带吗?
Sorry , the line is busy .
对不起，占线了。
Hope you'll like it .
希望你会喜欢。
We'll certainly help you if we can .
要是可能我们一定会帮助你。
I won't disturb you again unless I have to .
除非不得己我将不再来打扰你。
The sooner , the better .
越快越好。
------------------------------------------------------
Exercises (练习)
练习一：在下面句子中的省略从句下划线
1 . When taken according to the directions , the drug has no side effects .
2 . Though reduced in numbers, they gained infighting capacity.
3 . Often she would weep when alone .
4 . While in London Lenin studied the English labour movement .
5 . He would never do this unless compelled.
6 . I will return them as soon as possible .
8 . He glanced about as if in search of something .
9 . lf possible , I should like to have two copies of it .
练习二：将下面英语句子翻译成中文：
1 . Nothing more you want to say ?
1 . 没有什么别的话要说了?
2 . Too bad you can't join us in the celebration .
2 . 很遗憾你不能来参加我们的庆祝。
3 . Don't know what they'll do next .
3 .不知道他们下步怎么办
4 . If he doesn't want to stay in bed, we'd better not force him to.
4 .如果他不想待在床上，最好别勉强他。
5 . Her opinion, whether right or wrong, should be considered.
5 .她的意见不管对还是错应当考虑。
6 . We'll get everything ready tomorrow if not earlier.
6 .明天我们把一切准备好，如果不更早的话。
7 . I'll do all I can to help them .
7 .我要竭尽全力帮助他。
