高中英語語法中有三座大山：定語從句,，名詞性從句和狀語從句,。

我們之前講過定語從句和名詞性從句的用法。今天主要來講一講狀語從句,。

我們從以下幾個(gè)方面來講解狀語從句：

1. 什么是狀語從句？

狀語是用來修飾動(dòng)詞,、形容詞,、副詞或者句子的一種句子成分,。它可以表示時(shí)間、地點(diǎn),、原因,、目的、結(jié)果,、條件,、讓步、比較,、方式等,。當(dāng)充當(dāng)狀語的部分是一個(gè)句子時(shí)，也就是狀語從句,。

1. 狀語從句分為幾類,？

狀語從句一共有9類：

1. 時(shí)間狀語從句；2. 地點(diǎn)狀語從句,；3. 原因狀語從句,；4. 條件狀語從句；5. 讓步狀語從句,；6. 目的狀語從句,；7. 結(jié)果狀語從句；8. 方式狀語從句,；9. 比較狀語從句,。其中最常用的是時(shí)間狀語從句。

1. 時(shí)間狀語從句的引導(dǎo)詞：時(shí)間狀語從句引導(dǎo)詞分為兩部分：

as,，while ,，when ， whenever ,，before ,， after ， until (till) ,，since ,， as soon as，every time,，next time,，the first/…time，the moment,，the minute/…,，instantly，immediately,，directly　(一…就…)

no sooner… than…, hardly/ scarcely/ barely…when…

1. 地點(diǎn)狀語從句引導(dǎo)詞：

地點(diǎn)狀語從句用連接副詞 where或wherever (在任何地方) 引導(dǎo),。

1. 原因狀語從句引導(dǎo)詞：

because, as, since, now that, for,和considering that, seeing that 這七個(gè)連詞都用于表示表示原因, 但在語氣上一個(gè)比一個(gè)弱,。

1. 條件狀語從句的引導(dǎo)詞：

if, unless (除非), as / so long as (只要), on condition (只要), once ( 一旦), in case (假使) , providing / provided (that) 等,。

1. 讓步狀語從句引導(dǎo)詞：

引導(dǎo)詞：though, although, even if, even though,no matter + 疑問詞(what/ who/ where/ when/ which/ how),，疑問詞-ever (whatever, whoever, wherever, whenever, however, whichever)

1. 目的狀語從句引導(dǎo)詞：

in order that …，so that,，for fear that; in case; lest (以免)等,。

1. 結(jié)果狀語從句引導(dǎo)詞：

so, so … that, such … that; so that 等

1. 方式狀語從句引導(dǎo)詞：

as, just as, as if, as though, the way (that), in the way (that)等

1. 比較狀語從句引導(dǎo)詞：

as …as, not so / as … as, more…than, less … than, the more + adj. / adv., the more + adj. / adv.

1. 特殊用法：as用在不同的狀語從句中意義不同：比如：

1. She sang as she worked.

2. Smart as he is ,he doesn’t study hard.

3. You must try to doasI did.

4. She doesn’t do her work as carefully as I.

5. As she was late for class, she had to say sorry.

1. 部分狀語從句可使用省略形式：

even if, if , once, while, though, unless, when, as if etc.

1.The flower his friends gave him will die unless (it is) watered every day..

2.Even if (I am) invited, I won’t go there.

3.Once (you are) caught sleeping in class, you’ll be punished by your head-teacher .

4.Though (he was) surprised to see us, he gave us a warm welcome.

5.She won’t speak to anyone unless (she is) asked to.

6.When (it is) compared with the old one, our new house is really like a palace.

7.These young man volunteered to go wherever (they are) needed.