状语从句的省略

状语从句的省略

一、五种状语从句常简化:

① if, unless条件状语从句;

② when, while, as, before, after, until / till时间状语从句;

③ although, though, even if / though让步状语从句;

④ as, as if方式状语从句;

⑤ as, than比较状语从句。

二、状语从句省略的两个条件:

①主句和从句的主语一致，或从句主语为it；

②

从句谓语动词含有be的某种形式。

e.g.

条件：He’ll go to the seaside fo r his holiday if (it is) possible.

时间：When (the museum is) completed, the museum will be open to the public next year.

比较：I’m taller than he (is tall ).

The higher the temperature (is), the greater the pressure (is ).

三、状语从句省略后的形式

1）从句主语为it的从句：

条件：If (it is) possible, he will help you out of the difficulty.

让步：You must attend the meeting unless (it is) inconvenient to you. 2）主句和从句的主语一致

a.连词+形容词

As (he was) young, he learned how to ride a bike.

Whenever (she is) free, she often goes shopping.

Work hard when (you are) young, or you'll regret.

b.连词+名词

While (he was) a young boy, he was always ready to help others. Although (he was) a farmer, now he is a famous director.

c.连词+现在分词

As (she was) walking along the river bank, she was singing a pop song. Although (he is) doing his best in maths these days, he has still got no good marks.

d.连词+过去分词

He won't go there with us unless (he is) invited.

The concert was a great success than (it was) expected.

e.连词+不定式

He stood up as if (he were) to say something.

He wouldn't solve the problem even if (he were) to take charge.

f. 连词+介词短语

She looked anxious as though (she was) in trouble.

He had mastered the English language before (he was) in the USA.

注意:当从句主语和主句主语不一致时,从句部分要么用完整的句子,要么用独立主格结构来表达。例如:

When the meeting was over, all the people went out of the meeting-room. =The meeting over, ……