人教新课标必修三-Unit-4-Astronomy-Grammar主语从句教学课件

1、Subject ClauseSubject Clause学习目标：1. 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；3. 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。学习目标：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 harmful to you.5. What she sa

2、id is not yet known.6. That we shall be late is certain.7. Its certain that we shall be late.Revision Find the subjects in主语从句在句中充当主语的从句叫做主语从句。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 subje

4、ct 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？1That he will come is certain.主语从句的引导词：连词 that , whether 连接代词 who(ever), whom(ever), which(ever), what(ever)连接副词 where ,when ,why ,how 主语从句的引导词：依据“缺什么补什么”原则确定正确的连词。所谓“缺什么补什么”是指句型结构与连词之间的关系。如果句子中缺主语，指人用who，指物用what；如缺宾语，

5、指人用whom，指物用what；如缺时间状语用when；地点状语用where；原因状语用why；方式状语用how；定语用what或which；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 coming doesnt matter much.依据“缺什么补什么”原则确定正确的连词。所谓“缺什么补什么”Complete the sentences using what, whether, whe

6、re, 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 teacher.5.(_ it will rain or not) is not clear.7.(_ the earth is a sol

7、id 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。Conclusion:Complete the sentences using w注 意：What you left are only several old books.What you said is of great importance.Whetherhellcomehereis n

8、otclear.1.“if” 不能引导主语从句，应有“whether”引导。3.主语从句的 “that” 一般不能省。4.“what”引导主语从句时，谓语动词： 1）常与其后的名词作表语一致 2）根据句子的语境而定。4. 主语从句需注意的问题2.主语从句中用陈述语序注 意：What you left are only se 1. _ you dont like him is none of my business. 2. _ he said at the meeting astonished everybody present3. _ the 2000 Olympic Games will b

9、e 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. ThatWhatWhetherWhetherWhoever选择恰当的连接词 1. _ you dont like him iMake sentences Its certain .well be late. Is he coming or not ？We dont knowWhat does he want t

10、o 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 dont know what he wants to tell us.What he wants to tell us is not known.When you will come back

11、doesnt matter.It doesnt matter when you will come back.Make sentences Its certain .I_ 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 Whether C That D Where Choose the best choice _ he made an important s

12、peec3. It worried her a bit _ her hair was turning gray.whether B. that C. what D. when4.What I say and think _ none of your business. A. is B. are C. has D have3. It worried her a bit _ heIt + be + 形容词 that从句It is necessary that 有必要It is important that . 重要的是It is obvious that 很明显It + be + -ed分词 that从句It is believed that 人们相信It is known to us/all that . 众所周知It has been decided that 已经决定用it形式主语的that从句有以下四种不同的搭配：It + be + 形容词 that从句It is neIt + be + 名词 th