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.ayin
2、gThey _ young baby animals and produced milk to feed them.gave birth toDinosaurs e_ on the earth for more than 140 million years.xistedprevent.from 使.不做某事,阻止.做某事Nothing will prevent us from studying hard.stopkeepOne hundred and forty million years before humans _,dinosaurs ruled the earth.At that ti
3、me 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 _ the dinosaurs l
4、ife.existedgave birth tolayingprevent 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 whythe earth is becoming warmer.2.Whether other astron
5、omers accept his idea remains a question.真正的主语形式主语主语从句 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 believe is that the continued
6、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 or that.1.(_ is needed for su
7、ccess)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.WhatWhen/HowWhere/whetherWhoWhe
8、therThat6.(_ 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:.It was not clear whether the solid shape would last or not.Subject ClauseSubjectFormed SubjectWhether the solid shape would last or not was not clear.Real引导主语从句在句首只能用whether,有it作形式主语的whether/if都可
9、以.Conclusion:ifIf the 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 in the text how life began on the earth.Conclusion:That 在主语从句中不能省略.1.用
10、what/whether/that/if/where/how/when/why/who/how much/etc.来连接主语从句.Summary:Subject Clause4.引导主语从句在句首只能用whether,有it作形式主语的whether/if都可以.5.That 在主语从句中不能省略.2.有时为了使句子结构平衡,避免“头重脚轻”,常用it 作形式主语,而把从句放在后面.pour intois harmful to our home.What is harmful to our home?That the factory pours waste water into riversp
11、roblemsdestroyed the balance of nature .That people cut down too many treescut downWhat destroyed the balance of nature?problemspollutes our home.That people throw rubbish everywherethrow everywhereWhat pollutes our home?problemsmakes animals endangered._ people kill too many Antelope for moneykill
12、for moneyWhat makes the Antelope endangered?ProblemsThat_makes Antelopeendangered is that people kill too many Antelope.Whatthat与whatwhat在从句中作主语、宾语、表语,而that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 end
13、angered is that _problemsStep 2.suggestionA:I suggest/believe that should(not)C:What suggests/believes is that B:What does he suggest?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 _
14、 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 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 toda
15、y and Subject clause.confidentdifferentpatientpresentconfidencedifferencepatiencepresence2.Mother always comes back home in timeto 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动词过去式过去分词现在分词意义lielaylainlying躺，位于lieliedliedlying撒谎laylaid laidlaying搁，放，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
