2019年12月英语四级语法:从句中的省略

坦途网英语四级考试频道为大家持续更新英语四级考试报名时间以及注意事项等内容，各位想要报考四级的朋友记得关注本频道，小编将为大家持续更新。语法是我们语言类学习的根基，能够保证表达的准确性，如果使用错误会造成他人误解的情况。

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.

Look out for cars when crossing the street.

When taken according to the directions, the drug has no side effects.

While there he joined in voluntary labour on a project.

Although not yet six months old, she was able to walk without support.

If not well managed, irrigation can be harmful.

Though reduced in numbers, they gained in fighting capacity.

This viewpoint, however understandable, is wrong.

Enemies, once discovered, were tightly encircled and completely wiped out.

She hurriedly left the room as though/if angry.

She worked extremely hard though still rather poor in health.

Fill in the application as instructed.

Whenever known, such facts should be reported.

The documents will be returned as soon as signed.

He said that no acrobat could ever perform those daring feats unless trained very young.

Once having made a promise, you should keep it.

If necessary I’ll have the letter duplicated.

Fill in the blanks with articles where(ver) necessary.

If possible, I should like to have two copies of it.

As scheduled, they met on January 20 at the Chinese Embassy.

在以than a) 或 as b) 引起的从句中,常会有一些成分省略.

He told me not to use more material than (it is) necessary.

We should think more of the collective than of ourselves.

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.

错误的省略

His life is as fully committed to books as anyone I know.

While standing there in her nightgown, two bullets struck the wall beside her.

一致

如果主语是单数,尽管后面跟有with, together with, as well as, as much as, no less than, more than等引导的短语,谓语动词仍旧用单数形式.

Terry, along with her friend, goes skating every Saturday.

An expert, together with some assistants, was sent to help in this work.

The captain, as well as the coaches, was disappointed in the team.

英语四级考试语法涉及的知识点和我们在高中时期所学相差不多，因此只要在平时花时间去学和练习，是比较容易得到提高的。很多同学总是忽略语法的重要性，因此不论在翻译还是阅读中会出现表达不准确的现象，丢了很多分数。语法也能够帮助我们分析一些复杂的句子，综合来说语法的重要性是不可小觑的。