初中英語語法專項(xiàng)訓(xùn)練題：狀語從句

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【名師點(diǎn)睛】

用來修飾主句中的動詞，副詞和形容詞的從句叫狀語從句。根據(jù)其含義狀語從句可分為時間狀語從句，地點(diǎn)狀語從句，條件狀語從句， 原因狀語從句，結(jié)果狀語從句，比較狀語從句，目的狀語從句，讓步狀語從句。

1. 時間狀語從句

(1)時間狀語從句常用when, as, while, before, after, since, till, until, as soon as等連詞來引導(dǎo)。例如：

It was raining hard when got to school yesterday.

While he was doing his homework, the telephone rang.

As he walked along the lake, he sang happily.

He had learned a little Chinese before he came to China.

After he finished middle school, he went to work in a factory.

(2)在時間狀語從句里，通常不用將來時態(tài)，用現(xiàn)在時態(tài)表示將來的動作或狀態(tài)。例如：

I’ll ring you up as soon as I get to New York.

I will tell him everything when he comes back.

He won’t believe it until he sees it with his own eyes.

(3)在帶有till或until引導(dǎo)的時間狀語從句的主從復(fù)合句里，如果主句用肯定式，其含義是“一直到……時”，謂語動詞只能用延續(xù)性動詞。如果主句用否定式，其含義是“直到……才……”, “在……以前不……”, 謂語動詞可用瞬間動詞。例如：

The young man read till the light went out.

Let’s wait until the rain stops.

     We won’t start until Bob comes.

     Don’t get off until the bus stops.

2. 條件狀語從句

(1)條件狀語從句通常由if, unless引導(dǎo)。例如：

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