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语法：主语从句

授课版本：人教版BOOK3

授课年级：高一

授课学科：英语

授课人：孙某某

单位：围场一中

The Subject clause

What is the subject?

I love English.

The train left.

主语：是一个句子说明的人或事物，即叙述的主题，一般位于句首。

Find out the subject

Jim is good at playing the piano.

To see is to believe.

Smoking is bad for health.

What he has said is true.

The Subject Clause

在主从复合句中充当主语的从句就是主语从句，它是名词性从句之一。引导主语从句的连接词有：

从属连词 that , whether;连接代词有who , what，whoever, whatever和which等;连接副词 when, where, how和why等.

考纲专题解读

1 了解名词性从句的基本用法，掌握名词性从句的引导词及引导词在名词性从句中的作用，辨析that 与what, if 与whether等引导词的用法。

2 明确it 作形式主语和形式宾代替主语从句和宾语从句的用法及其与强调句的区别。

3 区分that引导的同位语从句和定语从句

理解主语从句

他通过了考试让老师很高兴。

That he passed the exam made the teacher happy.

He passed the exam.

It made the teacher happy.

He passed the exam made the teacher happy.

他何时要来还不清楚。

When he will come is not clear.

When will he come?

It ’s not clear.

When will he come is not clear.

Find out The Subject Clause

That he will succeed is certain.

Whether he will come makes no difference.

What we need is more time .

Tips: 先找谓语

引导词

1）从属连词that 和whether:

That he will come is certain.

Whether he will come is uncertain.

That 只起引导作用，本身无意义，不充当成分，但不可省略。

Whether不做成分，表“是否”在主语从句中只能用whether不能用if。

2）连接代词who, what， which Who will go makes no difference.

What we need is more money.

Which book I shall choose hasn’t been decided

3) 连接代词whoever ,whatever ,whichever

Whoever comes is welcome.

Whatever I have is yours.

Whichever you want is OK.

Whoever=anyone who

Whatever=anything that

4) 连接副词when，where，how，why

When we will leave hasn’t been decided.

How she keeps healthy is a secret.

Why he cries is not clear.

Where the meeting will be held is not known.

主语从句的特点：

1.引导词：

从属连词 that，whether；

连接代词 who，what，which；

whoever，whatever，whichever；

连接副词 when，where，how和why。

2.语序：陈述句语序

3.在主语从句中只能使用whether，不能用if

That he will win the match is certain.

It is certain that he will win the match.

注解：一般来说主语从句都是放在句首，但有时为了使句子保持平衡，避免“头重脚轻”，常用 it 作形式主语，从而把主语从句放在后面。

这样就构成了下面一些常用句型：

1）It is + n. + that

It is a pity that XXXXX 可惜的是XXXXXXXXXX

It is a surprise thatXXXXX 令人吃惊的是XXXXX..

It is a fact that XXXXX 事实是XXXXX

It is common knowledge thatXXXXX XXXXX是常识

It is a pity that (很可惜) we lost the match.

It is a fact that (这是事实) he cheated in the exam.

1.令人吃惊的是他改变了主意。

.

2.真可惜你错过了这么一个好机会。

3.事实是我们周围的污染正变得越来越严重。

It is a surprise that he changed his mind

It is a pity that you missed such a good chance.

It is a fact that the pollution around us is becoming more and more serious.

2) It is + adj. + that

It’s certain that XXXXX 肯定XXXXX

It is possible/likely that XXXXX 很可能XXXXX

It is obvious/clear that XXXXX 很明显XXXXX

It is true that XXXXX 的确XXXXX

It is necessary /important/natural/... thatXXXXX +(should) +doXXXXX

It is possible that(很可能) she will come back tomorrow.

It is obvious that(很明显) he is an Englishman.

很可能他会申请这项工作的。

的确我犯了个错误。

有必要我们要学习英语。

Translate the sentences

It is likely that he will apply for the job.

It is true that I made a mistake.

It is necessary that we should learn English.

3) It +不及物动词+that

It happened thatXXXXX 碰巧XXXXXXXXXX

It hit/struck/occurred to me that

我突然想起XXXXXXXXXX..

It seems/appears thatXXXXXXXXXX似乎XXXXX..

It turns/turned out that XXXXXXXXXX结果是； 原来是

It happened that I was out yesterday.

It occurred to me that I forgot to send the letter.

好像是我错了。

碰巧他得去参加一个会议。

我突然想起他会说英语。

原来他是Mary的朋友。

It seems that I am wrong.

It happened that he had to attend a meeting.

It occurred to me that he can speak English .

It turned out that he was Mary’s friend.

4) It +be +过去分词+从句

It’ s said thatXXXXX..据说XXXXXXXXXX..

It’s known that 众所周知XXXXXXXXXX..

It’s reported that 据报道XXXXXXXXXX.

It’s believed that 人们相信XXXXX.

It ‘s suggested that +(should ) do XXXXX建议XXXXX..

It ‘s reported that 20 people were killed in the accident.

It’s suggested that we should eat more vegetables and do more exercise.

据说他已经去了上海

众所周知，台湾是中国的一部分。

有人建议我们应该多做运动。

It’s said that he has gone to Shanghai.

It’s known that Taiwan is a part of china.

It’s suggested that we should take more exercise.

主语从句的规律

When he will come is not known.

规律1

主语从句一律用陈述句语序，即主语在前，谓语在后。

That he will not come to the meeting this evening is true.

规律2

连词that 在从句中无实际意义，但不能省略。

Whether the meeting will be put off hasn’t been decided yet.

规律三

Whether 可以引导主语从句放在句首但if 不能。

When he will come is a puzzle.

规律四

主语从句的谓语动词多用单某某

1 What he needs is the book.

2 What he needs are some books.

规律5

What 引导的主语从句可以根据表语决定主句动词的单复数形式。

小试牛刀

他是不是我的孩子仍然是个问题。

Whether he is my child remains a question.

我最喜欢的是钱。

What I like most is money.

雨天穿雨鞋是常识。

It ’s common knowledge that we should wear rain shoes on rainy days.

任何人犯错误都应该受到惩罚

Whoever makes a mistake should be punished.

什么时候举办运动会还没确定呢。

When the sports meeting will be held hasn’t been decided.

高考链接

单句语法填空

1 ________we need more practice is quite obvious.

2_________they can solve the problem is still unknown.

3__________he said at the meeting astonished everybody.

4 __________is a fact that English is accepted as an international language.

That

Whether

What

It

改错

1 When the meeting will be held haven’t been decided yet.

2 If we will have a meeting hasn’t been decided yet.

3 It’s important that we will finish the work on time.

4 That she wants to know is when the party will be held.

5 He will give up his job surprises all of us.

hasn’t

Whether

should

What

That[全文已结束，注意以上仅为全文的文字预览，不包含图片和表格以及排版]

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