UKISET考试导读：近年来，英国是我们国家留学的热门，所以很多留学生都会选择英国留学，UKISET考试成了热门，下面就由英国私立学校入学考试资源网小编分类给同学们介绍一些考试必考语法。
省略
1、在以as, than, when, if, unless等引导的从句中的省略: 在有些状语从句中,如果谓语包含有动词be,主语又和主句的主语一致a),或者主语是it b),就常常可以把从句中的主语和谓语的一部分(特别是动词be)省略掉.
1）Look out for cars when crossing the street.
When taken according to the directions, the drug has no side effects.
If not well managed, irrigation can be harmful.
Though reduced in numbers, they gained in fighting capacity.
He said that no acrobat could ever perform those daring feats unless trained very young.
Once having made a promise, you should keep it.
2）If necessary I’ll have the letter duplicated.
As scheduled, they met on January 20 at the Chinese Embassy.
2、在以than a) 或 as b) 引起的从句中,常会有一些成分省略.
1）He told me not to use more material than (it is) necessary.
We should think more of the collective than of ourselves.
2）They worked with as much enthusiasm as young people (did).
He is now a vice-manager, but still often works in the kitchen as before.
Their training is free, as is all education.
We will, as always, stand on your side.
3、错误的省略
1）His life is as fully committed to books as anyone I know.
2）While standing there in her nightgown, two bullets struck the wall beside her.
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