高三一轮复习---主语从句（38张）ppt课件

1、David arrived last night. Who is speaking, please? Two will be enough. Looking up all the new words in the dictionary took him a lot of time. To translate this ideal into reality needs hard work.How to do well is an important question. What has happened proves that our policy is right. Underline the

2、 subjects in the following sentences. n. pron. num. to do v-ingphrasesentencesubject clause Find all the examples in the reading passage where noun clauses are used as the subject.( () )( () )( () )( () ) ( ( () )( () )( () ) )( () )( () )名词性从句：名词性从句：名词性从句的功能：名词性从句的功能：名词性从句的类型：名词性从句的类型：在句子中起名词作用的句子叫

3、名词性从句。在句子中起名词作用的句子叫名词性从句。名词性从句的功能相当于名词词组。名词性从句的功能相当于名词词组。它在复合句中能担任主语、宾语、表语、同它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同位语、介词宾语等，因此根据它在句中不同的语法功能，名词从句又可分别称为的语法功能，名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从主语从句、宾语从句、表语从句和同位语从句。句。主语从句在复合句中作句子的主语。引主语从句在复合句中作句子的主语。引导主语从句的词有导主语从句的词有从属连词从属连词: that, whether, if；衔接代词衔接代词: who,

4、whoever, whom, what, whatever, whose, which；衔接副词衔接副词: when, where, how, why等。等。察看以下例句，指出其中所包含的主语察看以下例句，指出其中所包含的主语从句及引导词从句及引导词:1. What is needed for a long trip is careful preparation.该句中主语从句是该句中主语从句是 _，引导词为，引导词为 _。What is needed for a whatlong trip2. That Jay Zhou will come to my city excites everyb

5、ody.该句中主语从句是该句中主语从句是 _ _，引导词为，引导词为_。3. Whether we will travel abroad or not has not been decided.该句中主语从句是该句中主语从句是 _ _，引导词为，引导词为_。That Jay Zhou willWhether we willcome to my city thattravel abroad or notwhether4. Whoever knows the secret mustnt tell others.该句中主语从句是该句中主语从句是_ _，引导词为，引导词为_。5. It remains

6、 a puzzle why dinosaurs died out suddenly long time ago.该句中主语从句是该句中主语从句是_，引导词为，引导词为_。Whoever knows the whoeverwhy dinosaurs diedwhysecretout suddenly long time ago【察看总结】【察看总结】第第5句中的主语从句似乎比较隐蔽。其实，句中的主语从句似乎比较隐蔽。其实，这也是主语从句的一种呈现方式，即：当这也是主语从句的一种呈现方式，即：当一个句子主语过长时，可以用一个句子主语过长时，可以用it作方式主作方式主语，而把真正的主语或主语从句后移

7、至句语，而把真正的主语或主语从句后移至句子末尾，以坚持句子的平衡。留意察看以子末尾，以坚持句子的平衡。留意察看以下例句中的划线部分：下例句中的划线部分：It is not clear how the accident happened.It is a pity that you should have made such a careless mistake.It happened that I didnt bring the key with me.It is reported that more than thirty deaths were caused in the accident.

8、不难看出，虽然上面例句中都用不难看出，虽然上面例句中都用it作方式作方式主语，但句子构造却不尽一样。现将常主语，但句子构造却不尽一样。现将常见的由见的由it作方式主语的句型总结如下：作方式主语的句型总结如下：1. It be + n. + that从句从句2. It be + adj. + that从句，常见此类描画从句，常见此类描画词有：词有：important, necessary, clear, certain, natural, strange, obvious, likely, impossible, possible等。等。3. It+不及物动词不及物动词+that从句从句It o

9、ccurred to sb. that . 某人想起某人想起It happened (to sb.) that . 某人碰巧某人碰巧4. It + be + v-ed + 主语从句主语从句It is said / reported / believed / suggested / known / proved that .【要点精讲】【要点精讲】1. what与与that引导主语从句引导主语从句察看以下例句，试着翻译例句并总结察看以下例句，试着翻译例句并总结其规律。其规律。(1) What you lack is self-confidence. 译为：译为：_他所缺乏的是自信。他所缺乏的是自

10、信。(2) That more and more students are admitted into universities is true.译为：译为：_ _(3) What is needed for the program is more wisdom. 译为：译为：_这个工程所需求的是更多的智慧。这个工程所需求的是更多的智慧。越来越多的学生将被大学录取越来越多的学生将被大学录取的音讯是真实的。的音讯是真实的。从上面例句可以看出，that引导主语从句时，在句中具有“两不原那么：一、引导从句；二、不作句子成分；三、没有实践意义。而而what引导的从句那么恰恰相反，引导的从句那么恰恰相反

11、，what在从句中的作用为：在从句中的作用为：一、引导从句；一、引导从句；二、作句子成分；二、作句子成分；三、有详细的意义。三、有详细的意义。【稳定练习】【稳定练习】 用用what或或that填空。填空。(1) _ he told us this morning was just a lie.(2) _ is important to us is enough time.(3) It worries my mom _ she is beginning to get a little fat.(4) _ we cant get seems better than _ we have.WhatWh

12、atthatWhatwhat2. whether与与if引导主语从句引导主语从句whether与与if引导主语从句位于句中有引导主语从句位于句中有时可换用。但在以下情况下用时可换用。但在以下情况下用whether不用不用if：(1) 主语从句位于句首时；主语从句位于句首时；(2) 从句后有从句后有or或紧跟或紧跟or not时。时。【稳定练习】【稳定练习】 用用whether或或if填空。填空。(1) It doesnt matter _ he will come or not.(2) _ well go camping tomorrow depends on the weather.(3)

13、It was doubtful _ Tom really saw Sharon.(4) _ Tom really saw Sharon was doubtful.whether / ifWhetherwhether / ifWhether3. 其它引导词其它引导词 衔接代词衔接代词who, which, whom, whose有各自的详细意义，起衔接作用，同时有各自的详细意义，起衔接作用，同时在从句中充任主语、宾语、表语、定语在从句中充任主语、宾语、表语、定语等；等；whoever, whatever, whichever在意在意义上更为强调，常译为义上更为强调，常译为“无论无论；衔；衔接副词

14、接副词when, where, why, how等也有各等也有各自的意义，起衔接作用，并在从句中作自的意义，起衔接作用，并在从句中作状语。状语。【常见错误展现】【常见错误展现】 以下各句均有一处错误，请矫以下各句均有一处错误，请矫正并分析错误的缘由。正并分析错误的缘由。1. Light travels faster than sound is common knowledge.Thatthat虽无词义但引导主语从句位虽无词义但引导主语从句位于句首时不能省略。于句首时不能省略。if, whether都可表示都可表示“能否能否, 但但if不能引导句首主语从句。不能引导句首主语从句。2. If sh

15、es coming or not doesnt matter much.Whether shes coming or not doesnt3. What were your problems a year ago has now become mine.has要改为要改为have。主语从句表示复数。主语从句表示复数概念时，谓语要用复数方式。概念时，谓语要用复数方式。have4. That the professor said is of great importance.5. Where will the trees be planted has not been decided.Whatth

16、at引导主语从句时无词义。引导主语从句时无词义。What the professor said表示表示“教授所说的话。教授所说的话。将将will置于置于trees之后。主语从句要之后。主语从句要用陈说句语序。用陈说句语序。6. No matter who breaks the rule will be punished.7. When and where the meeting will be held still remain a question.引导退让状语从句时二者可互换，但引导退让状语从句时二者可互换，但引导名词性从句时只能用引导名词性从句时只能用whoever。Whoever 主语

17、从句表示单一概念时，谓语要用主语从句表示单一概念时，谓语要用单数方式。单数方式。remainsRewrite the following sentences with noun clauses as the subject. 1. His discovery has not yet been proved. 2. Do the other astronomers accept his ideas? It remains a question.What has not yet been proved is his discovery. Whether the other astronomers

18、accept his ideas remains a question.3. The first appearance of life on earth is still a mystery to scientists. 4. Why is the earth becoming warmer? It is an important topic for research.How life first appeared on earth is still a mystery to scientists.Why the earth is becoming warmer is an important

19、 topic for research.5. Stephen Hawking at 65 experienced zero gravity during a flight. It amazed everybody.6. Pluto is no longer considered a planet in our solar system. What a surprise!It amazed everybody that Stephen Hawking at 65 experienced zero gravity during a flight.It is a surprise that Plut

20、o is no longer considered a planet in our solar system.All of life is an act of letting go, but what hurts the most is not taking a moment to say goodbye.人生就是不断地放下，人生就是不断地放下，但最令人痛心的是，但最令人痛心的是，我们来不及好好告别。我们来不及好好告别。Line from the film Life of Pi subject clauseIts rare that I find someone so non-patroniz

21、ing.Line from the film Zootopia subject clauseWhat pains us trains us. What doesnt kill us makes us stronger. What hurts us the most teaches us the best. 使我们苦楚的东西在真正锻造我们。使我们苦楚的东西在真正锻造我们。没有要我们命的事情让我们更强大。没有要我们命的事情让我们更强大。损伤我们最深的教会我们最多。损伤我们最深的教会我们最多。subject clauses用适当的衔接词补全下面的对话。用适当的衔接词补全下面的对话。Lucy: Why

22、 are you looking so happy?Jenny: Ive just attended a lecture. _ the speaker said made me excited.Lucy: What was it about?Jenny: About health. It seems _ a lot of people dont know how to keep healthy.What that Lucy: Sounds great. _ Im concerned about is my health condition at the moment. But what sho

23、uld I do to be healthy?Jenny: _ you will stay healthy depends on two factors exercise and diet.Lucy: You know I always do some running on the road every night.What WhetherJenny: Whether you take exercise is one thing, but _ you take exercise is quite another. You shouldnt run at night because it will a