高考二轮语法复习主语从句课件.pptx

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1、Her job is teaching.What she does is teaching. 在句中充当主语的从句叫做主语从句。在句中充当主语的从句叫做主语从句。定义定义1That he will come is certain.2Whether it will please them is not easy to say.3What seems easy to some people seems difficult to others.4Which side will win is not clear.5Why he did it remains a mystery.6When they w

2、ill start is not known yet.7How he became a great scientist is known to us all.8Who will take part in the meeting has not been decided.9Whoever breaks the law will be punished.10Where she is from is unknown.连接词连接词that 无实际意义 只起连接作用是否连接词如何选用？1.1.从句中什么成分都不缺，用从句中什么成分都不缺，用 2.2.从句中需要表从句中需要表“是否是否”的词，用的词，用3

3、.3.其他，缺什么补什么其他，缺什么补什么连接词的选用连接词的选用thatwhether如缺如缺“哪一个哪一个”的意思，的意思，用用 which主语从句的连接词：主语从句的连接词： 连接词连接词 that , whether 连接代词连接代词 who(ever), whom(ever), which(ever), what(ever)等等 连接副词连接副词 where ,when ,why ,howComplete the sentences using what, whether, where, when， who, why, how or that.1.(_ is needed for s

4、uccess) is your hard work.3.(_ we will go tomorrow )hasnt been decided yet.2.(_ they will arrive )has been told to the teacher.4.(_ can join in the sport meet) is decided by the teacher.5.(_ it will rain or not) is not clear.WhatWhen/How/WhetherWhere/whetherWhoWhether选择连接词：缺什么补什么。选择连接词：缺什么补什么。Conclu

5、sion:主语从句作主语时，谓语动词一般用主语从句作主语时，谓语动词一般用 。单数形式单数形式 注意注意: 由由that 引导的主语从句有时为了使句子结引导的主语从句有时为了使句子结构平衡构平衡, 避免避免 “头重脚轻头重脚轻”, 常用常用 it 作作形式主语形式主语, 而把从句放在后面。而把从句放在后面。 例如例如: 1. That he will refuse this piece of advice is impossible.2.That they should like each other is natural. *it为形式主语为形式主语It is natural that th

6、ey should like each other.It is impossible that he will refuse this piece of advice.It作形式主语的四种常用句型 It +be+名词名词+that从句 It +be+形容词形容词+that从句 It +不及物动词不及物动词+that从句 It +be+动词的过去分词动词的过去分词+that从句 1) It is + n. +从句从句 It is a pity/a fact/a surprise that *_(很遗憾很遗憾)we lose the match.*_(这是事实这是事实)he cheated in

7、the exam.It is a pity thatIt is a fact that2) It is + adj. +从句从句 It is possible that. Its certain that *_(很可能很可能)she will come back tomorrow.It is possible that3) It +不及物动词不及物动词+从句从句 It happened that. 刚好刚好;碰巧碰巧 It occurred to me that 我突然想起我突然想起*It happened that I came into the office at that time.*I

8、t occurred to me that I forget to send the letter.我刚好在那个时候进入办公室。我刚好在那个时候进入办公室。我突然想到我忘记寄信了。我突然想到我忘记寄信了。4) It + be +过去分词过去分词+从句从句 It is said that. It is known to all that. It is reported that. *_(据报道据报道)20 people were killed in the accident. It is reported that主语从句的规律：找出下列句子中的错误，并总结规律例1.When will he c

9、ome is not known.规律一、规律一、主语从句一律用主语从句一律用陈述语序陈述语序， 即主语在前，谓语在后。即主语在前，谓语在后。正：When he will come is not known.主语从句的规律：例2. He will not come to the meeting this evening is true.正：That he will not come to the meeting this evening is true.规律二、规律二、连词连词that 在从句中无实际意义，在从句中无实际意义，但但不能省略不能省略。主语从句的规律：例3. If the meet

10、ing will be put off has not been decided yet.正： Whether the meeting will be put off has not been decided yet.规律三、规律三、引导主语从句在引导主语从句在句首只能用句首只能用whether,有有it作形式主语的作形式主语的whether/if都可以都可以. It has not been decided yet _ the meeting will be put off.if/whether主语从句的规律： 例4. That whether he will help others is

11、a fact.正：That he will help others is a fact.规律四、规律四、主语从句中的连词主语从句中的连词不能重叠不能重叠使用使用主语从句的规律：例5. When he will come are a puzzle.正：When he will come is a puzzle.规律五、规律五、含主语从句的主句谓语动词含主语从句的主句谓语动词多用多用单数第三人称单数第三人称形式。形式。主语从句的规律：1. What he needs is that book.2. What he needs are some books.规律六、规律六、what 引导的主语从句，

12、可根据引导的主语从句，可根据 表语决定表语决定主句动词的单复数形式主句动词的单复数形式。规律七、规律七、主语从句为了避免头重脚轻现象，主语从句为了避免头重脚轻现象，用用 it 做做形式主语，形式主语，而把从句放在后面。而把从句放在后面。 That the earth turns around the sun is known to all. It is known to all that the earth turns around the sun.2. _ they can solve the question is still unknown. A. If B. Which C. Whet

13、her D. What3. _ he said at the meeting astonished everybody. A. Why B. What C. That D. Who4. _ is a fact that English is accepted as an international language. A. There B. This C. That D. It1. _ we need more practice is quite obvious. A. What B. That C. When D. /找出错误，并给出理由：1.Where shall we spend the

14、 holiday isnt decided. 2.You have made a mistake is a fact. 3. If the policeman will come is not certain.4. That is certain that we can win. we shallWhetherItThat you have5. It is ordered we should leave at once.6. Where he comes from are a mystery.7. What whether he likes the job is not clear.8. Wh

15、o he is and where he is from is important. 9.What he saw is the stars in the sky.thatisxareare主语从句的虚拟语气主语从句的虚拟语气表表 “应该，惊讶、惋惜、遗憾应该，惊讶、惋惜、遗憾”等意义等意义It is important /natural /necessary/strange that. 谓语形式为谓语形式为:(should) + V.原形原形 eg. 很奇怪，他竟没有来。很奇怪，他竟没有来。 It is strange that_. he should not come 表示表示“据建议、据要求、据命令据建议、据要求、据命令” It+be+suggested/advised/ordered/requested/commanded/ insisted/required that谓语形式为谓语形式为:(should) + V.原形原形据命令，所有乘客必须接受搜查据命令，所有乘客必须接受搜查It was ordered that all the passengers _.(should) be searched