河北省石家庄市第一中学高中英语 unit4 Astronomy learning about language grammar教学课件 新人教版必修3.ppt

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1、 A time machineBig Banga solid globeatmosphere waterIt became very v_iolentIn time it produced some gases.The water on the earth is u_ that on other planetswaternlikeplants in the watershellfish and fishplants on landinsects and amphibiansReptiles Dinosaurs Mammals They produced young by l_ eggs.ayi

2、ngThey _ young baby animals and produced milk to feed them.gave birth toDinosaurs e_ on the earth for more than 140 million years.xisted prevent.from 使使.不做某事不做某事,阻止阻止.做某事做某事Nothing will prevent us from studying hard.stopkeep One hundred and forty million years before humans _,dinosaurs ruled the ear

3、th.At that time they had few natural enemies.So they developed quickly.They _ young by _ eggs.Until now no one knows the exact reason why the dinosaurs were unable to _ themselves _ disappearing altogether.They died out _.Maybe as some scientists guess,that the earths weather became hot and dry _ th

4、e dinosaurs life.existedgave birth tolaying prevent from in timewas harmful toFill in the blanks using some of the words on the blackboard.1.What he discovered has not yet been proved.The subject ClauseThe subject Clause3.It is an important topic for research why the earth is becoming warmer.2.Wheth

5、er other astronomers accept his idea remains a question.真正的主语真正的主语形式主语形式主语主语从句主语从句 subject clause Find the sentences with the subject clauses from the reading passage in Par.35.Par3.4.It was not immediately obvious that water was to be fundamental to the development of life.5.What many scientists be

6、lieve is that the continued presence of water 7.Whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.Par4.6.Why they suddenly disappeared still remains a mystery.Par5.Complete the sentences using what,whether,where,when,who,why,how o

7、r 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 solid ball)is known to us all.Wha

8、tWhen/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:.It was not clear whether the solid shape would last or not.Subject ClauseSubjectFormed SubjectWhether the solid shape would last or not was not cl

9、ear.Real引导主语从句在句首只能用引导主语从句在句首只能用whether,有有it作形式主语的作形式主语的whether/if都可以都可以.Conclusion:ifIfthe earth is a solid globeThatis known to us all.It is known to us all that the earth is a solid ball.Use“it”to rewrite two sentences.How life began on the earth has been learned in the text.It has been learned i

10、n the text how life began on the earth.Conclusion:That 在主语从句中不能省略.1.用用 what/whether/that/if/where/how/when/why/who/how much/etc.来连接主语从句来连接主语从句.Summary:Subject Clause4.引导主语从句在句首只能用引导主语从句在句首只能用whether,有有it作形式主语的作形式主语的whether/if都可以都可以.5.That 在主语从句中在主语从句中不能省略不能省略.2.有时为了使句子有时为了使句子结构平衡结构平衡,避免避免“头重脚轻头重脚轻”,

11、常用常用 it 作形式主语作形式主语,而把从句放在后面而把从句放在后面.pour into is harmful to our home.What is harmful to our home?That the factory pours waste water into riversproblemsdestroyed the balance of nature .That people cut down too many treescut downWhat destroyed the balance of nature?problemspollutes our home.That peopl

12、e throw rubbish everywherethrow everywhereWhat pollutes our home?problems makes animals endangered._ people kill too many Antelope for moneykill for moneyWhat makes the Antelope endangered?ProblemsThat _makes Antelope endangered is that people kill too many Antelope.Whatthat与与whatwhat在从句中作主语、宾语、表语在从

13、句中作主语、宾语、表语,而而that则不作句子成分则不作句子成分.Conclusion:What makes the birds endangered?makes birds endangered.give off2.That_smoke3.It is reported thatfactory1.What makes birds endangered is that _problems Step 2.suggestionA:I suggest/believe that should(not)C:What suggests/believes is that B:What does he sugg

14、est?As a student,we should do many things to protect our earth.DiscussionWhat should we do to protect our home?nWhat I want to say is that _.nIt is obvious that _.nThat _ pollutes our earth.nWhy I say so is that _.nHow we can protect it is _.nWhat we should do first is that _.nWhether our earth can

15、be protected depends on _.Only if we care will we help,only if we help shall all be saved!1.Turn the report into a composition using the words and phrases we learned today and Subject clause.confidentdifferentpatientpresentconfidencedifferencepatiencepresence2.Mother always comes back home in time t

16、o prepare dinner.at last,finally1.If you keep on,you will succeed in time.not latecertain fairpaidkinduncertainunfairunpaidunkindThe water from the factory _is harmful to the river.Your smoking is harmful to your childs health.is harmful to动词动词过去式过去式过去分词过去分词现在分词现在分词意义意义lielaylainlying躺，位于躺，位于lieliedliedlying撒谎撒谎laylaid laidlaying搁，放，搁，放，下蛋下蛋The naughty boy _ to me that the hen that _ there just now had_ two eggs the day before.A.laid;laid;laid B.laid;lay;lainC.lied;laid;lain D.lied;lay;laidD