高中英语Unit 1 Science and Scientists课堂教学课件ppt

表语从句

[观察例句]

1．One theory was that bad air caused the disease.

2．The question is who will be the successful applicant for the summer job at the law firm.

3．Her confusion is whether she should stick to her own way of life or follow the American way.

4．What John Snow was determined to find out was why the 1854 outbreak of cholera in London could have caused over 500 deaths within ten days.

5．Taking a year off from school to travel abroad is what is generally called a gap year.

[归纳用法]

1．所有例句中的黑体部分都位于系动词be后，作表语，故都是表语从句，这些表语从句在词性上相当于一个名词。

2．例1由从属连词that引导；例2由连接代词who引导；例3由从属连词whether引导；例4由连接副词why引导；例5由连接代词what引导。

表语从句放在连系动词之后，充当复合句中的表语。表语从句就是指一个句子作为表语，说明主语是什么或者怎么样。

一般结构为“主语＋系动词＋表语从句”。可接表语从句的连系动词有be，look，remain，seem等。

1．从属连词that引导的表语从句

从属连词that的用法：①无意义　②不充当成分

③不可省略

The reason for his absence is that he hasn't been informed.

他缺席的原因是他没接到通知。

My suggestion is that we should tell him.

我的建议是我们应该告诉他。

2．从属连词whether引导的表语从句

The point is whether we should lend him the money.

关键在于我们是否应该借钱给他。

[名师点津]　if不能引导表语从句。

3．连接代词和连接副词引导的表语从句

The problem is who is really fit for the hard job.

问题是谁才真正适合做这份艰苦的工作。

This is what I am interested in.

这就是我所感兴趣的。

That's where I first met her.

那就是我第一次遇见她的地方。

4．because，as if/though等引导的表语从句

It's just because he doesn't know her.

这仅仅是因为他不认识她。

Now it seems as though she had known Millie for years.

现在好像她认识米莉已有好多年了似的。

It sounds as if someone is knocking at the door.

听起来好像有人在敲门。

[即学即练1]　用where，when，that填空

①Look at the high mountain.That is where we will get.

②The first time we met each other was when we studied in that school.

③My advice is that we (should) work together.

5．why和because引导的表语从句的区别

I didn't phone her，and that's why she got angry with me.(强调“没打电话”这一结果)

我没有给她打电话。那就是她对我生气的原因。

I didn't phone her，and that's because I got angry with her.(强调“生气”这一原因)

我没有给她打电话。那是因为我生她的气了。

[名师点津]

reason作主语时，后面的表语从句表示原因时要用that引导，不宜用because。

6．表语从句中的虚拟语气

在表语从句中，表示间接的命令、要求、请求、建议、决定等，主句中的主语通常是：advice，suggestion，proposal，request，order，idea等，从句谓语形式是“should＋动词原形”(should可以省略)。

My advice is that you (should) practise speaking English as often as possible.

我的建议是你应该尽可能经常地练习说英语。

[即学即练2]　用why，that，because填空

①It was raining hard；that was why I came late.

②I came late；that was because it was raining hard.

③The reason why I came late was that it was raining hard.

Ⅰ.单句语法填空

1．He got caught in the heavy traffic.That was why he was late.

2．Energy is what makes things work.

3．We didn't set out；it was because we wanted to wait until our mother came back.

4．The most pleasant thing of the rainy season is that one can be entirely free from dust.

5．A ship in harbor is safe，but that's not what ships are built for.

6．The trouble is that I can't find my way.

7．What he wants to know is whether we can finish our work by tomorrow morning.

8．The reason why I was sad was that he didn't understand me.

9．That is what we are looking forward to.

10．Sam looked as if he didn't have a care in the world.

Ⅱ.完成句子

1．简再也不是十年前的那个样子了。

Jane is no longer what she was ten years ago.

2．我获悉了你对英语校报的改革方案，那就是为什么我写信表达我自己观点的原因。

I read about your reform of the school English

newspaper，and that's why I'm writing to voice my opinion．

3．问题是他们是否能帮我们。

The question is whether they will be able to help us．

4．那是因为他没有理解我。

That was because he didn't understand me．

5．事实就是我们队已经赢得了比赛。

The fact is that our team has won the game．

Ⅲ. 短文语法填空 (用适当的连接词填空)

Everyone knew 1. that Wendy was a famous writer，but no one knew 2.where she came from and 3. whether she was born in 1961 was still a mystery. 4.What they did know was 5.that she was loved by poor people because she always helped 6.whoever was in need of money. Wendy was generous and helpful，but some people thought she was chasing fame. Wendy said she didn't understand 7.why they were so narrow­minded，but it didn't matter 8.what others thought of her. She just wanted to do 9.what(ever) she thought was right. She thought that was 10.where the meaning of life lied.