高中英语Module2 rSectionⅢGrammar_表语从句和主语从句教案含解析外研版选修7

Section Ⅲ Grammar —表语从句和主语从句语法图解

探究发现

①My feeling is that they're going to be big one day.

②But the big surprise of the evening was when I was elected prom queen!

③China is no longer what it used to be.

④The reason why I'm calling you is that I want to invite you to my birthday party.

⑤That she has became an artist may have been due to her father's influence.

⑥What we should do next remains unknown.

⑦Whether it will do us harm remains to be seen.

⑧It's a good thing that the exams are finished.

[我的发现]

(1)以上句中，①～④句中黑体部分均引导表语从句，而⑤～⑧句中黑体部分则引导主语从句。

(2)由④句可知，主语为名词reason时，表语从句中的连接词要用that，而不用why。

(3)由⑤⑥句知，引导主语从句时，what要在从句中充当句子成分，而that不作任何成分，只在语法上起连接作用。

(4)⑧句中，it用作形式主语，代替that引导的主语从句。

一、表语从句

1．定义

在复合句中作表语的从句，叫作表语从句。它位于主句的系动词之后，对主语进行解释、说明，使主语的内容具体化。

2．引导词

[即时演练1] 用适当的连接词填空

①My opinion is that we should communicate with parents frequently.

②The problem is whether we can find them there.

③This is what I should have done first of all.

④This is where I don't agree with you.

⑤The question is how we can get in touch with him.

⑥The problem is who will come to replace her.

⑦This is because it is raining outside.

3．注意事项

(1)that与what的区别

that引导表语从句时，是连词，在从句中不作成分；what是连接代词，引导表语从句时，在从句中作主语、宾语、表语或定语。

That was what she did this morning on her way to school.

那就是她今天早晨在去学校的路上做过的事。

(2)because与why的区别

because引导表语从句时强调原因，why引导表语从句时强调结果。

She often comes late.That's because she has a baby to take care of.

她经常迟到。那是因为她有一个孩子要照顾。

She has a baby to take care of.That's why she often comes late.

她有一个孩子要照顾。那就是她经常迟到的原因。

[名师点津] 名词reason作主语时，后面的表语从句表示原因时要用that引导，而不用because。

The reason why he was late is that it was raining hard.

他来晚了是因为天正下大雨。

[即时演练2] 用that/what/because/why填空

①(2016·北京高考改编)The most pleasant thing of the rainy season is that one can be entirely free from dust.

②This was what he told me.

③My belief is that I will succeed by working hard.

④I had neither a raincoat nor an umbrella.That is why I got wet through.

⑤You always make the same mistakes in the exams.I think that is because you are too nervous.

(3)虚拟语气用于表语从句

①在表示建议、劝告、命令等含义的名词后的表语从句中，谓语动词用“should＋动词原形”，should可以省略。

My suggestion is that we (should) have a discussion about this matter instead of just laying it aside.

我的建议是我们应当讨论一下这件事，而不应该只是把它放在一边。

②as if/as though引导的表语从句常用虚拟语气。用一般过去时表示现在，过去进行时表示现在进行，过去完成时表示过去，could/would/might＋动词原形表示将来。

It looks as if he were ten years younger today.

今天他看起来好像年轻了10岁。