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(共15张PPT)
Section Ⅲ　Using language
Unit 2 A life’s work
表语从句
观察下面句子，体会黑体词所作句子成分。
①My idea is that his plan should be carried out immediately.
②What he wants to know is whether he should start a new set of computations or not.
③It looks as if the coming autumn harvest will be even better than the last one.
④The question is who is the right person for the position.
⑤What I want to know is when she'll be back.
⑥The suggestion is that we(should)come to his assistance at once.
[自主归纳]
1．由句①、②可知，从属连词 、 可引导表语从句，但在从句中 成分。
2．由句③可知，as if、as though也可引导 从句。
3．根据句④可知，连接代词引导表语从句时在从句中 成分。
4．由句⑤可知，连接副词引导表语从句时往往在从句中充当 。
5．根据句⑥可知，表示“建议(suggestion)、要求(demand)等”的名词后的表语从句中要用 语气，即谓语动词用“ do”的形式。
that
whether
不充当
表语
充当
状语
虚拟
(should)
在句中充当表语的从句称为表语从句。引导表语从句的从属连词有as、as if/though、because、that、whether等；连接代词有what(ever)、which、who、whom、whose等；连接副词有when(ever)、where、why、how等。表语从句主要位于系动词be之后，有时可用在look、seem、taste等之后。
一、由从属连词引导的表语从句
1．that引导表语从句(that在从句中不充当成分)。
你最大的毛病是粗心。
2．whether引导表语从句(whether在从句中不充当成分)。
The point is whether we ought to recommend him.　
问题是我们是否应该推荐他。
[名师点津]　
一般不用if引导表语从句。
3．as、as if/though引导表语从句，从句中的谓语动词可用陈述句语气，也可用虚拟语气。
The problem is as simple as it seems.
这个问题就像它看起来一样简单。
The meat tastes as if/though it has already gone bad.(陈述句语气)
这肉尝起来似乎已经坏了。
He looks as if he were in great pain.(虚拟语气)
他看上去很痛苦。
4．because引导的表语从句。
This is because the earth travels around the sun.
这是因为地球绕着太阳转。
[名师点津]　
why和because引导的表语从句的区别。
that's why... 意为“那是……的原因，这就是为什么……”，强调结果
that's because... 意为“那是因为……”，强调原因
二、由连接代词引导的表语从句
连接代词引导表语从句时，除连接主从句外，还在从句中充当一个成分，可作主语、宾语、表语或定语。
The turning of the earth on its own axis is what makes the day and night alternation.
地球的自转是昼夜交替的原因。(主语)
The question is which of the units we choose to be the fundamental one.
问题是我们选哪一个做基本单位。(宾语)
Times aren't what they were.
时代不同了。(表语)
What I want to know is whose bag was stolen.
我想知道谁的包被偷了。(定语)
三、由连接副词引导的表语从句
连接副词除引导表语从句外，还在从句中充当状语，可表示时间、地点、原因、方式等。
This is where our basic interest lies.
这就是我们的根本利益所在。(地点状语)
That's why we decided to put the meeting off.
那就是我们决定推迟会议的原因。(原因状语)
The question is how the people can find an effective way to store the sun's heat.
问题是人们如何才能找到一种有效的方法来储存太阳的热量。(方式状语)
四、表语从句中的虚拟语气用法
当主语中含有suggestion、advice、order、demand、requirement、request 等名词时，表语从句的谓语动词用 “(should) do” 结构。
The doctor's advice was that you (should) give up smoking.
医生建议你戒烟。
Our demand is that you (should) finish the work as quickly as possible.
我们的要求是你们尽快完成这项工作。
Ⅰ.单句语法填空
1．My predicament is will marry a poor man like me.
2．The problem is of the following experiments we should do first.
3．Raw material is we are badly in need of.
4．What I want to know is watch it is.
5．My advice is that you (go)at once.
6．I broke her favourite glass.That's she got angry with me.
who
which
what
whose
(should) go
why
7．He has heart disease.That is he has been smoking too much.
8．My question is I shall get in touch with him when I arrive in Beijing.
9．What I was uncertain about was we could overcome the difficulties all by ourselves.
10．One of the advantages of electric power is it can be transmitted over long distance very easily.
because
how
whether
that
Ⅱ.完成句子
1．此命令是连队立刻过河。
The order was that the company at once.
2．这就是他在学习英语中战胜所有困难的方法。
That's in learning English.
3．他们一点没变；他们还和从前一样。
They remain unchanged.They are .
4．她胃疼，那就是她只吃了一点儿东西的原因。
She had a stomachache. she ate so little.
(should) cross the river
how he has overcome all the difficulties
what they used to be
That is why
5．当把铅笔的半截插入一个装有水的玻璃杯中时，铅笔看上去就好像断了。
When a pencil is partly in a glass of water，it looks ．
as if/though it were
broken

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