江苏省徐州市铜山县2017届高三英语一轮复习状语从句1教学案

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状语从句（一）

课题：状语从句（一）

教学目标：了解状语从句的分类情况及在各类状语从句中经常使用的连接词；

教学重难点：能够在真实的语境中判断从句与主句的逻辑关系，从而能够使用恰当的连接词完成交际；

能够辨别同类状语从句中近似连接词的用法差异。

教学过程

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2. (2015·天津高考)We need to get to the root of the problem ______ we can solve it.

A. while

B. after

C. before

D. as

【解题关键】

1. while, when和as的用法区别:

(1)基本用法。

①while引导的时间状语从句须用持续性动词, 意为“当……时候”“趁着……”。

We must strike while the iron is hot.

②when引导的时间状语从句既可用持续性动词又可用非持续性动词。

③as意为“一边……一边……”“随着”“正当”。

As each day passes, China becomes more and more powerful.

(2)特殊用法。

①when可作并列连词, 表示突然发生某事, 意为“正在……这时/忽然……”。

She was about to walk out of the door when the telephone rang.

②while可作并列连词, 表示“然而, 却”。

Motion is absolute while stagnation is relative.

2. before常用句式:

It will(not)be+一段时间+before. . . ; It was not long before. . . ; It was+时间段+before. . .

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3. since常用句式:

It is/has been+一段时间+since. . . (从句用一般过去时);

It was+一段时间+since. . . (从句非延续性动词用过去完成时)

4. 表示“一……就……”的句式: as soon as/once; on/upon(doing)sth. ; no sooner . . . than; hardly/scarcely. . . when; the moment; the instant; instantly; immediately等

5. 引导时间状语从句的其他常见连词(短语): whenever, every time, each time, next time, the first/last time, any time, by the time等。

考点2 条件状语从句

【典例】1. (2015·江苏高考)It is so cold that you can’t go outside ______ fully covered in

thick clothes.

A. if

B. unless

C. onc e

D. when

2. (2015·陕西高考)I believe you will have a wonderful time here ______ you ge t to know everyone else.

A. though

B. as if

C. once

D. so that

3. (2015·北京高考)You won’t find paper cutting difficult ______ you keep practicing it.

A. even though

B. as long as

C. as if

D. ever since

4. (2014·四川高考)I’ll be out for some time. ______ anything i mportant happens, call me up immediately.

A. In case

B. As if

C. Even though

D. Now that

【解题关键】

1. 条件状语从句的引导词: if, unles s(if. . . not), if only, once, so/as long as, suppose/supposing(that)(假设), in case(万一…, 以防…), so/as far as(就…而言), on condition that(条件是…), provided/providing(that)(假如)等。

2. 从句中一般用一般现在时表示将来。

I won’t go unless I’m invited.

You may use the room as/so long as you clean it up afterwards.

3. 特殊条件句:“祈使句+and/or/or else/otherwise+陈述句”的句型中, 祈使句可转化成条件状语从句。

Use your head, and you’ll find a way. =If you use your head, you’ll find a way.

考点3 原因状语从句

【典例】1. (2013·山东高考)Mark needs to learn Chinese ______ his company is opening a branch in Beijing.

A. unless

B. until

C. although

D. since

2. (2013·安徽高考)It’s much easier to make friends ______ you have similar interests.

A. unless

B. when

C. even though

D. so that

【解题关键】

1. 引导原因状语从句的从属连词主要有: because, as, since, seeing(that), now(that), considering(that)等。