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1、学习目标：学习目标：1. 掌握主语从句的基本概念；掌握主语从句的基本概念；2. 能从句中找出主语从句，并翻译句子；能从句中找出主语从句，并翻译句子；3. 能够概括出主语从句的引导词；能够概括出主语从句的引导词；4. 学会根据句意选择恰当的引导词。学会根据句意选择恰当的引导词。Revision Find the subjects in the following sentences.1. A tree has fallen across the road.2. You are a student.3. To find your way can be a problem.4. Smoking is
2、 harmful to you.5. What she said is not yet known.6. That we shall be late is certain.7. Its certain that we shall be late.主语从句主语从句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。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
3、.4Which side will win is not clear.5Why he did it remains a mystery.6When they will 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.Find the subj
4、ect clauses in the following sentences, and translate them.思考：主语从句有哪些引导词，这些引导词如何选用？思考：主语从句有哪些引导词，这些引导词如何选用？主语从句的引导词：主语从句的引导词：连词连词 that , whether 连接代词连接代词 who(ever), whom(ever), which(ever), what(ever)连接副词连接副词 where ,when ,why ,how 依据“缺什么补什么缺什么补什么”原则确定正确的连词。所谓所谓“缺什缺什么补什么么补什么”是指句型结构与连词之间的关系。如果句子中是指句型结
5、构与连词之间的关系。如果句子中缺主语，指人用缺主语，指人用who，指物用，指物用what；如缺宾语，指人用；如缺宾语，指人用whom，指物用，指物用what；如缺时间状语用；如缺时间状语用when；地点状语；地点状语用用where；原因状语用；原因状语用why；方式状语用；方式状语用how；定语用；定语用what或或which；什么都不缺用；什么都不缺用that。Where he will go is unknown. What you said yesterday is right.That he knows Japanese is known to all.Whether he is co
6、ming doesnt matter much.Complete the sentences using what, whether, where, when， who, why, how or that.1.(_ is needed for success) 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
7、 teacher.5.(_ it will rain or not) is not clear.7.(_ the earth is a solid ball) is known to us all.WhatWhen/HowWhere/whetherWhoWhetherThat6. (_ the earth is becoming warm) is a good topic for research.Why主语从句作主语时，谓语动词一般用单数形式。主语从句作主语时，谓语动词一般用单数形式。Conclusion:注注 意：意：1.What you left are only several old
8、 books.2.What you said is of great importance.3.Whether hell come here is not clear. 1.“if” 不能引导主语从句，应有不能引导主语从句，应有“whether”引导。引导。3.主语从句的主语从句的 “that” 一般不能省。一般不能省。4.“what”引导主语从句时，谓语动词：引导主语从句时，谓语动词： 1）常与其后的名词作表语一致）常与其后的名词作表语一致 2）根据句子的语）根据句子的语境而定。境而定。4. 主语从句需注意的问题主语从句需注意的问题2.主语从句中用陈述语序主语从句中用陈述语序 1. _ yo
9、u dont like him is none of my business. 2. _ he said at the meeting astonished everybody present3. _ the 2000 Olympic Games will be held in Beijing is not known yet.4. _ well go camping tomorrow depends on the weather.5. _ leaves the room last ought to turn off the lights. ThatWhatWhetherWhetherWhoe
10、verMake sentences Its certain .well be late. Is he coming or not ？We dont knowWhat does he want to tell us?We dont knowWhen will you come back?It doesnt matter.Its certain that we will be late.That well be late is certain.We dont know whether he is coming or not Whether he is coming is not known.We
11、dont know what he wants to tell us.What he wants to tell us is not known.When you will come back doesnt matter.It doesnt matter when you will come back.1._ he made an important speech at the meeting was true. A. That B. Why C. What D. How 2. _well go camping tomorrow depends on the weather . A If B
12、Whether C That D Where 3. It worried her a bit _ her hair was turning gray.A.whether B. that C. what D. when4.What I say and think _ none of your business. A. is B. are C. has D haveIt + be + 形容词形容词 that从句从句It is necessary that 有必要有必要It is important that . 重要的是重要的是It is obvious that 很明显很明显It + be +
13、-ed分词分词 that从句从句It is believed that 人们相信人们相信It is known to us/all that . 众所周知众所周知It has been decided that 已经决定已经决定用用it形式主语的形式主语的that从句有以下四种从句有以下四种不同的搭配：不同的搭配：It + be + 名词名词 that从句从句It is common knowledge that 是常识是常识It is a surprise that . 令人惊奇的是令人惊奇的是It is a fact that 事实是事实是It + 不及物动词不及物动词 that从句从句It appears that 似乎似乎It happens that . 碰巧碰巧It occurred to me that 我突然想起我突然想起
能从中找出主语从句并翻译句子能够概括出主语
