高中英语新教材选修第1册同步ppt课件

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1、Working the LandUnit 5Scientific progress depends on the labor and the value of their inventions of scientists.科学的进步，取决于科学家的劳动和他们的发明科学的进步，取决于科学家的劳动和他们的发明的价值。的价值。单元主题语境人与自我Establishing a human colony on the Moon has been the stuff of dreams since the dawn of the space age.But how can humans survive f

2、or months or years in the ultra-hostile(极极端恶劣的端恶劣的)environment of space？What，for instance，will they eat?Agricultural researchers at a Dutch university say they are taking the first steps towards providing an answer.话题导入话题导入They are growing vegetables in soils similar to those found on the Moon1，look

3、ing for ways of helping space pioneers grow their own crops.“When people go to the Moon they also have to eat，and its easiest for them to grow their own food，”said Wieger Wamelink，surrounded by several dozen plants in a special greenhouse at Wageningen，an agricultural university in central Netherlan

4、ds.“We wanted to use real lunar soil to see if plants would actually grow in it，”Wamelink told reporters.Of course，getting real lunar potting soil is an impossible task.But an Internet search revealed an unlikely supplier:NASA，which makes ground similar to that on the Moon from sand found in an Ariz

5、ona desert.“To work in this soil was very special.Nobody，not even NASA，could tell us what would happen2，even just by simply adding water，”he said.The imitation ground at first was a little“reluctant”(勉强的勉强的)to absorb water，but soon turned out to be good potting soil.“The plants were growing very fas

6、t and very good.They even started to flower，something that we never anticipated(预料，预见预料，预见)，”Wamelink said.1.The university is known for its language and culture courses intended for international students.(2018北京，书面表达北京，书面表达)2.Firstly，this is precisely what the British visitors are expecting.(2019江

7、苏，书面表达江苏，书面表达)靓句运用于写作内容索引内容索引Period OneReading and ThinkingComprehending语篇理解 精读精练 萃取文本精华读前清障 识记单词 快速顺畅阅读匹配左边的单词与右边的汉语意思匹配左边的单词与右边的汉语意思第一组第一组1.devoteA.使增长；使兴旺使增长；使兴旺2.shortage B.把把献献(给给)；专心于；专心于3.crisis C.使相信；使确信；说服使相信；使确信；说服4.boost D.危机；危急关头危机；危急关头5.convince E.不足；缺少；短缺不足；缺少；短缺读 前 清 障识记单词 快速顺畅阅读第二组第二

8、组6.attain A.传统的；习惯的传统的；习惯的7.conventional B.消费；消耗；消耗量消费；消耗；消耗量8.assumption C.(通常经过努力通常经过努力)获得；得到获得；得到9.expand D.假定；设定；假定；设定；(责任的责任的)承担承担10.consumption E.扩大；增加；发展扩大；增加；发展第三组第三组11.generate A.展望；想象展望；想象12.celebrity B.现实；事实；实际情况现实；事实；实际情况13.envision C.产生；引起产生；引起14.reality D.扩大；扩建部分；电话分机扩大；扩建部分；电话分机15.ext

9、ension E.名人；名流；名望；名誉名人；名流；名望；名誉返 回Step 1Fast-reading1.Whats the main idea of the passage?A.Ways to increase the rice output.B.Yuan Longpings dreams.C.Yuan Longpings super hybrid rice.D.Yuan Longpingan agricultural pioneer.语 篇 理 解精读精练 萃取文本精华2.Match each paragraph with its main idea.Para.1A.Yuan condu

10、cted research and developed hybrid rice.Para.2B.Yuan is old but still full of dreams that he is turning into reality.Para.3C.Yuan considers himself a farmer.Para.4D.Yuan decided to study agriculture.Para.5E.Yuans innovation has helped to feed more people.Para.6F.Yuan cares little for celebrity or mo

11、ney.Step 2Careful-readingChoose the best answer.1.From the first paragraph，we know that Yuan Longping .A.is a farmerB.looks like a farmerC.has a weak bodyD.is Chinas most famous scientist2.Why did Yuan Longping choose to study agriculture?A.Because his parents wanted him to do so.B.Because he wanted

12、 to win awards in this field.C.Because farmers sometimes suffered from serious shortage of food at that time.D.Because he wanted to make more money by selling seeds.3.How long did it take Yuan Longping to develop his super hybrid rice?A.12 years.B.14 years.C.21 years.D.30 years.4.Which of the follow

13、ing can we know from the passage?A.Yuan Longping is living a life of leisure.B.Most experts on agriculture agreed on the possibility of developing a kind of hybrid rice.C.“Seawater rice”is a kind of rice that has a low output.D.Yuan Longping is not interested in becoming famous or wealthy.Step 3Post

14、-readingAfter reading the passage，please fill in the following blanks.Yuan Longping，who 1.(know)as the“father of hybrid rice”，considers himself a farmer.When he was young,2.concerned him most was farmers 3.(short)of food to eat，so he chose to study agriculture at college.After graduating in 1953，he

15、worked as a researcher and devoted himself to 4.(create)a kind of hybrid rice，which could attain a 5.(high)yield.In 1974，he succeeded in making it 6.reality.Today,60%of domestic consumption in China is comprised of crops 7.(generate)from his hybrid strains，is knownwhatshortagecreatinghighergenerated

16、afor which he has received numerous awards both in China and abroad.But the humorous old“farmer”，caring little 8.celebrity or money，is still living a simple life.Despite his 9.(advance)years，he is trying 10._ _(fulfill)his dreams of riding the world of hunger.foradvancedtofulfillStep 4Sentence-learn

17、ing1.However，what concerned him most was that farmers often had poor harvests and sometimes even had a serious shortage of food to eat.句式分析句式分析本句中名词性从句分别作主语和表语。本句中名词性从句分别作主语和表语。what concerned him most为句子的为句子的 ，表语从句为，表语从句为 引导的那一部分。引导的那一部分。to eat是动词不定式是动词不定式表目的。表目的。自主翻译自主翻译_主语主语that 然而，他最担忧的是农民们的收成不好，

18、有时甚至口粮严然而，他最担忧的是农民们的收成不好，有时甚至口粮严重短缺。重短缺。2.After graduating in 1953，he worked as a researcher.句式分析句式分析本句中本句中After graduating in 1953可以改写为可以改写为After he _ in 1953；从句的谓语动词；从句的谓语动词graduate与主语之间为与主语之间为 关系。关系。自主翻译自主翻译_graduated1953年大学毕业以后，他成了一名科研人员。年大学毕业以后，他成了一名科研人员。主动主动3.Today，it is estimated that about 6

19、0 per cent of domestic rice consumption in China is comprised of crops generated from Yuans hybrid strains，and his strains have allowed Chinas farmers to produce around 200 million tons of rice per year.句式分析句式分析本句为本句为it 作作 的复合句。真正的主语是的复合句。真正的主语是 引导的从句，引导的从句，而真正的主语太长，为了避免句子头重脚轻，所以用而真正的主语太长，为了避免句子头重脚轻

20、，所以用 it。自主翻译自主翻译_形式主语形式主语that形式主语形式主语 据估计，现在中国国内消费的大米有大约据估计，现在中国国内消费的大米有大约60%来自袁隆平的杂来自袁隆平的杂交水稻，他的杂交水稻让中国农民每年能够生产大约两亿吨大米。交水稻，他的杂交水稻让中国农民每年能够生产大约两亿吨大米。4.Given that Yuans hybrids have made him quite wealthy，one might think he would retire to a life of leisure.句式分析句式分析本句中本句中Given that.为连词，相当于为连词，相当于cons

21、idering，意为，意为“_”。自主翻译自主翻译_返 回考虑考虑到；鉴于到；鉴于 考虑到杂交水稻让袁隆平变得相当富有，人们可能认为他会退考虑到杂交水稻让袁隆平变得相当富有，人们可能认为他会退休享受闲适的生活。休享受闲适的生活。内容索引内容索引Period TwoReading and Thinking&Learning About LanguageLanguage Points互动探究 探究重点 互动撞击思维基础自测 自主学习 落实基础知识达标检测 当堂检测 基础达标演练重点单词1.n.(pl.crises)危机；危急关头危机；危急关头2.vt.(通常经过努力通常经过努力)获得；得到获得；得

22、到3.n.特征；特点；品质特征；特点；品质 adj.典型的；独特的典型的；独特的4.adj.传统的；习惯的传统的；习惯的5.vt.克服；解决；战胜克服；解决；战胜6.vt.&vi.扩大；增加扩大；增加 vt.扩展；发展扩展；发展(业务业务)基 础 自 测自主学习 落实基础知识crisisattaincharacteristicconventionalovercomeexpand7.vt.估计；估价；估算估计；估价；估算 n.估计；估算估计；估算8.vt.包括；包含；由包括；包含；由组成组成9.n.名人；名流；名望；名誉名人；名流；名望；名誉10.vt.展望；想象展望；想象11.n.不足；缺少；

23、短缺不足；缺少；短缺 adj.短的短的12.vt.把把献献(给给)；把；把专用于；专心于专用于；专心于 adj.忠诚的；挚爱的；专心的忠诚的；挚爱的；专心的 n.献身；奉献；忠诚献身；奉献；忠诚estimatecomprisecelebrityenvisionshortageshortdevotedevoteddevotion13.n.假定；设定；假定；设定；(责任的责任的)承担；承担；(权利的权利的)获得获得 v.假定；认为；承担假定；认为；承担14.n.消耗；消耗量；消费消耗；消耗量；消费 v.消耗；消费消耗；消费15.n.现实；实际情况；事实现实；实际情况；事实 adj.真的；真实的；现

24、实的真的；真实的；现实的16.vt.使相信；使确信；说服使相信；使确信；说服 adj.令人信服的令人信服的assumptionassumeconsumptionconsumerealityrealconvinceconvincing17.vt.产生；引起产生；引起 n.产生；一代人产生；一代人18.n.扩建部分；扩大；电话分机扩建部分；扩大；电话分机 v.延伸；扩大；推广延伸；扩大；推广generategenerationextensionextend掌握规律巧记单词掌握规律巧记单词short adj.短的短的ageshortage n.短缺；缺少；不足短缺；缺少；不足例：例：shrinkag

25、e收缩；缩小收缩；缩小wreckage残骸；毁灭残骸；毁灭bandage绷带绷带assume v.假设；假定去掉假设；假定去掉eptionassumption n.假定；设定；假定；设定；(责任责任的的)承担承担例：例：consumption消耗；消费；消耗量消耗；消费；消耗量1.把把用于；献身；致力；专心用于；献身；致力；专心2.包括；包含；由包括；包含；由组成组成(或构成或构成)3.在内心深处；本质上；实际上在内心深处；本质上；实际上4.被用于被用于5.依靠依靠6.因为；由于因为；由于7.远非；绝不是远非；绝不是8.在意；喜欢在意；喜欢9.成功地做某事成功地做某事10.凭空想出凭空想出(不

26、同寻常的计划、主意不同寻常的计划、主意)devote.tobe comprised ofdeep downbe used fordepend onbecause offar fromcare forsucceed in doing sth.dream up核心短语1.名词性从句作主语和表语名词性从句作主语和表语However，_ was _and sometimes even had a serious shortage of food to eat.然而，他最担忧的是农民们的收成不好，有时甚至口粮严重短缺。然而，他最担忧的是农民们的收成不好，有时甚至口粮严重短缺。2.现在分词作时间状语现在分

27、词作时间状语 in 1953，he worked as a researcher.1953年大学毕业以后，他成了一名科研人员。年大学毕业以后，他成了一名科研人员。经典句式what concerned him most that farmers often had poor harvestsAfter graduating3.it作形式主语作形式主语Today,about 60 per cent of domestic rice consumption in China is comprised of crops generated from Yuans hybrid strains，and h

28、is strains have allowed Chinas farmers to produce around 200 million tons of rice per year.据估计，现在中国国内消费的大米有大约据估计，现在中国国内消费的大米有大约60%来自袁隆平的杂交水稻，他来自袁隆平的杂交水稻，他的杂交水稻让中国农民每年能够生产大约两亿吨大米。的杂交水稻让中国农民每年能够生产大约两亿吨大米。返 回it is estimated thatIndeed，his slim but strong body is just like those of millions of Chinese f

29、armers to whom he has devoted his life.事实上，他瘦削但结实的身躯看起事实上，他瘦削但结实的身躯看起来和他为之奉献了一生的千千万万的中国农民一样。来和他为之奉献了一生的千千万万的中国农民一样。1devote vt.把把献献(给给)；把；把专用于；专心于专用于；专心于(常与介词常与介词to连用连用)互 动 探 究探究重点 互动撞击思维重点词汇devote.to把把奉献给；把奉献给；把专注于专注于devote oneself to致力于；献身于致力于；献身于devoted adj.深爱的；忠诚的深爱的；忠诚的be devoted to专心于；致力于专心于；致力

30、于devotion n.关爱；奉献关爱；奉献(1)If you have a job，do devote yourself to it and finally you will succeed.如果你有份工作，务必投身于它，最终你将会成功。如果你有份工作，务必投身于它，最终你将会成功。(2)I dont think we should devote any more time to (persuade)such a stubborn man to change his mind.我认为我们不应该再花时间来说服这么顽固的一个人改变主意。我认为我们不应该再花时间来说服这么顽固的一个人改变主意。(3

31、)He is so to his English teaching that I admire him for his _(devote).他如此深爱他的英语教学，以至于我对他的奉献感到敬佩。他如此深爱他的英语教学，以至于我对他的奉献感到敬佩。persuadingdevoteddevotionYuan was convinced that the answer could be found in the creation of hybrid rice.袁隆平相信答案可以在杂交水稻的培养中找到。袁隆平相信答案可以在杂交水稻的培养中找到。2convince vt.使信服；使确信；说服使信服；使确信

32、；说服convince sb.of sth.使某人确信使某人确信/明白某事明白某事convince sb.that.使某人相信使某人相信convince sb.to do sth.说服某人做某事说服某人做某事convincing adj.令人信服的令人信服的convinced adj.确信的；坚信的确信的；坚信的be convinced(that)/of.(某人某人)坚信坚信(1)What she said convinced me that I was mistaken.她说的话让我相信我错了。她说的话让我相信我错了。(2)Weve been trying to convince him (

33、give)up the plan.我们一直在试图说服他放弃那个计划。我们一直在试图说服他放弃那个计划。(3)His speech was so (convince)that everyone present believed what he said.他的演讲很令人信服，以至于在场的所有人都相信他所说的话。他的演讲很令人信服，以至于在场的所有人都相信他所说的话。(4)Im not completely (convince)he knew the importance of practice.我不完全相信他知道实践的重要性。我不完全相信他知道实践的重要性。to giveconvincingcon

34、vincedOne characteristic of hybrids is that they usually attain a higher yield than conventional crops.杂交作物的特点之一就是比传统作物高产。杂交作物的特点之一就是比传统作物高产。3attain vt.(通常经过努力通常经过努力)获得；得到获得；得到attain ones aim达到某人的目的达到某人的目的attain the opposite shore到达对岸到达对岸attainable adj.可到达的；可得到的可到达的；可得到的(1)I am determined to attain

35、my purpose at any cost.我决心不惜任何代价达到目的。我决心不惜任何代价达到目的。(2)These trains are capable of (attain)very high speeds.这些火车能达到非常高的速度。这些火车能达到非常高的速度。(3)If the solutions are so (attain)，why havent we reached them yet？如果这些解决办法都那么可行，为什么我们还是没能实现呢？如果这些解决办法都那么可行，为什么我们还是没能实现呢？attainingattainableThe common assumption the

36、n was that it could not be done.当时大家都认当时大家都认为这件事情不可能做到。为这件事情不可能做到。4assumption n.假定，假设；假定，假设；(责任的责任的)承担；承担；(权利的权利的)获得获得on the assumption that.假定假定make an assumption作出臆断作出臆断assume v.假定；设想；承担；假装假定；设想；承担；假装assume sb./sth.(to be)adj./n.假定假定/认为某人认为某人/某事某事(为为)It is assumed that.人们认为人们认为assuming(that).假设假设(

37、1)You must admit that your argument is based on a completely false assumption.你必须承认你的论点建立在一个完全错误的假设上。你必须承认你的论点建立在一个完全错误的假设上。(2)People tend to based on your appearance.人们往往会对你以貌取人。人们往往会对你以貌取人。(3)They assumed her (be)the best singer of their time.他们认为她是他们那个时代最好的歌唱家。他们认为她是他们那个时代最好的歌唱家。(4)that was a dif

38、ficult problem impossible to overcome.人们当时认为那是一个无法克服的难题。人们当时认为那是一个无法克服的难题。make assumptions about youto beIt was assumed that一句多译一句多译(5)据我所知，很多人认为他是正确的。据我所知，很多人认为他是正确的。As far as Im concerned，a great many people he was right.(assume)As far as Im concerned，a great many people he was right.(assumption)a

39、ssumed thatmade an assumption thatThis hybrid enabled farmers to expand their output greatly.这种杂交水稻这种杂交水稻极大地提高了农民们的粮食产量。极大地提高了农民们的粮食产量。5expand vt.&vi.使变大；伸展使变大；伸展expand.into.把把扩展扩展/发展成发展成expand into.发展成发展成/扩大成扩大成expand on/upon sth.细说细说(阐述阐述)某事某事expansion n.扩大；扩张；扩展扩大；扩张；扩展(1)The narrow path in the v

40、illage expanded into a wide road.村里的狭窄小路拓宽成了一条大道。村里的狭窄小路拓宽成了一条大道。(2)A few years later，the writer his short novel a long one.几年以后，那位作家把他的短篇小说扩展成了长篇小说。几年以后，那位作家把他的短篇小说扩展成了长篇小说。(3)He did not expand greatly his statement.他未就他的声明多加解释。他未就他的声明多加解释。(4)The book is an (expand)of a series of lectures given las

41、t year.这本书是去年举行的系列讲座的扩充。这本书是去年举行的系列讲座的扩充。expandedintoon/uponexpansionToday，it is estimated that about 60 per cent of domestic rice consumption in China is comprised of crops generated from Yuans hybrid strains，and his strains have allowed Chinas farmers to produce around 200 million tons of rice per

42、 year.据估计，现在中国国内消据估计，现在中国国内消费的大米有大约费的大米有大约60%来自袁隆平的杂交水稻，他的杂交水稻让中国农民每年能够来自袁隆平的杂交水稻，他的杂交水稻让中国农民每年能够生产大约两亿吨大米。生产大约两亿吨大米。6estimate vt.估计，估量，估价估计，估量，估价 n.估计；估算估计；估算be estimated that.据估计据估计estimate sb./sth.to be.估计估计为为by estimate按照估计按照估计below estimate低于估计低于估计(1)Experts estimate that the consumption of gas

43、 will increase by 10%next year.专家估计明年汽油的消耗将增加专家估计明年汽油的消耗将增加10%。(2)The cost of building that railway (estimate)at over 10 billion dollars.那条铁路的建设费用估计要超过那条铁路的建设费用估计要超过100亿美元。亿美元。(3)total investment in the country will continue to increase this year.据估计国内投资总额今年将继续增加。据估计国内投资总额今年将继续增加。(4)The cost of deco

44、rating the stadium is estimated (be)3 million pounds.体育馆的装修花费估计要达到体育馆的装修花费估计要达到300万英镑。万英镑。is estimatedIt is estimated thatto beHis latest vision for“seawater rice”has also become a reality，and potentially opened up nearly one million square kilometres of salty land in China for rice production.最近他的最

45、近他的“海水稻海水稻”的愿望已经变成现实，这就的愿望已经变成现实，这就有可能把中国接近有可能把中国接近100万平方公里的盐碱地用于种植水稻。万平方公里的盐碱地用于种植水稻。7reality n.现实；事实；实际情况现实；事实；实际情况in reality实际上；事实上实际上；事实上reality of the day当前的现实当前的现实become reality成为现实成为现实(1)His plans were transformed into reality overnight.他的计划突然变成现实。他的计划突然变成现实。(2)The child thought he was being

46、helpful，but reality he was a nuisance.那孩子认为他在帮忙，但实际上他是个令人讨厌的家伙。那孩子认为他在帮忙，但实际上他是个令人讨厌的家伙。inHowever，what concerned him most was that farmers often had poor harvests and sometimes even had a serious shortage of food to eat.然而，然而，他最担忧的是农民们的收成不好，有时甚至口粮严重短缺。他最担忧的是农民们的收成不好，有时甚至口粮严重短缺。what concerned him mos

47、t为句子的主语，为句子的主语，that引导表语从句。引导表语从句。句中句中what引导主语从句，引导主语从句，what可以引导名词性从句，且可以在从句中可以引导名词性从句，且可以在从句中作主语、宾语、表语、定语、宾语补足语等成分。作主语、宾语、表语、定语、宾语补足语等成分。that引导表语从句时，在句中不作任何成分，无实义，只起连接作用。引导表语从句时，在句中不作任何成分，无实义，只起连接作用。经典句式(1)What I want to know is how he solved the shortage of funds in his company.我想知道的是他是如何解决了公司的资金短缺

48、问题的。我想知道的是他是如何解决了公司的资金短缺问题的。(2)What surprised me most was that such a little boy of seven could play the violin so well.让我非常吃惊的是一个七岁的孩子能把小提琴拉得这么好。让我非常吃惊的是一个七岁的孩子能把小提琴拉得这么好。(3)is also happening to me.正在他身上发生的事情也正发生在我身上。正在他身上发生的事情也正发生在我身上。(4)What made the mother angry was .让这位妈妈生气的是她的儿子拒绝服用任何药物。让这位妈妈生

49、气的是她的儿子拒绝服用任何药物。What is happening to himthat her son refused to take any medicine(5)This is .这就是我所感兴趣的。这就是我所感兴趣的。(6)I dont think is relevant to the topic we are discussing.我认为他所说的与我们正在讨论的话题无关。我认为他所说的与我们正在讨论的话题无关。返 回what Im interested inwhat he has said.单句语法填空单句语法填空1.I found his speech (convince)and

50、admired him for his eloquence(能言善辩能言善辩).2.My calculations were based on the (assume)that house prices would remain steady.3.(devote)to his scientific work，he has no time to care for his family affairs，which his wife always complains about.4.He became that countrys ruler both in name and reality.5.Mo

51、re women are (attain)positions of power in public life.达 标 检 测当堂检测 基础达标演练convincingassumptionDevotedinattaining6.starts as fun usage of apps turns into tremendous(巨大的巨大的)pressure in real social media interaction.7.At least 500 people were killed，and thats conservative(保守的保守的)estimate.8.They managed

52、to take in more students without (expand)the size of the schools.Whataexpanding.完成句子完成句子9.it will be more convenient for people to do some shopping online in the future.我相信在未来人们网上购物会变得更加方便。我相信在未来人们网上购物会变得更加方便。10.His company after ten years of hard work.经过十年的艰苦努力，他的公司已经扩展成了一个大公司。经过十年的艰苦努力，他的公司已经扩展成了一

53、个大公司。11.will have a lasting effect on my future career.你所说的话会对我未来的事业产生持续的影响。你所说的话会对我未来的事业产生持续的影响。Im convinced thathas expanded into a big oneWhat you have said12.you will expand your business to foreign countries.希望你们能将生意扩展到海外。希望你们能将生意扩展到海外。13.Experts generally stress is caused by too much work.专家们普

54、遍认为压力是由工作过多所致。专家们普遍认为压力是由工作过多所致。返 回It is hoped thatassume thatPeriod ThreeGrammarSubject clauses达标检测 当堂检测 基础达标演练语法导学 感悟规律 重点难点剖析内容索引内容索引感知以下课文原句，完成方框下的小题感知以下课文原句，完成方框下的小题1.However，what concerned him most was that farmers often had poor harvests and sometimes even had a serious shortage of food to ea

55、t.2.How this could be done was a challenging question at the time.3.However，whether it was possible to develop a hybrid of self-bollinating plants such as rice was a matter of great debate.语法感知语 法 导 学感悟规律 重点难点剖析4.Today，it is estimated that about 60 per cent of domestic rice consumption in China is c

56、omprised of crops generated from Yuans hybrid strains，.5.What impresses people most about Yuan Longping is his ongoing ability to fulfill his dreams.1.以上以上加颜色加颜色部分在句中作部分在句中作 。2.1句和句和5句中的句中的what在从句中作在从句中作 。3.3句中的句中的whether意为意为“”。4.4句中的句中的it是是 ，真正的主语是后面的，真正的主语是后面的 。5.2句中的句中的how在从句中作在从句中作 。主语主语主语主语是否是否

57、that引导的从句引导的从句状语状语形式主语形式主语一、主语从句的定义一、主语从句的定义如果一个从句在句子中担当主语，那么这个从句就是主语从句。主语从句如果一个从句在句子中担当主语，那么这个从句就是主语从句。主语从句通常放在主句的谓语动词之前，有时也由形式主语通常放在主句的谓语动词之前，有时也由形式主语it代替，而本身放在句代替，而本身放在句子末尾。子末尾。语法精析That you are coming to London is the best news I have heard this long time.你将要来伦敦是这么长时间以来我听到的最好的消息。你将要来伦敦是这么长时间以来我听到

58、的最好的消息。Whether they would support us was still a problem.他们是否会支持我们还是一个问题。他们是否会支持我们还是一个问题。What impressed me most was that they have all suffered a lot.让我印象最深刻的是他们都受过很多苦。让我印象最深刻的是他们都受过很多苦。Is it true that he is the girls father?他是那个女孩的父亲，是真的吗？他是那个女孩的父亲，是真的吗？二、主语从句的引导词二、主语从句的引导词类别类别例词例词说明说明从属连词从属连词that，

59、whether两者在从句中均不作成分，只起连接作两者在从句中均不作成分，只起连接作用；用；that无实义，无实义，whether表示表示“是否是否”。连接代词连接代词who，what，which，whoever，whatever等等在从句中作主语、宾语、表语、定语等在从句中作主语、宾语、表语、定语等成分。成分。连接副词连接副词when，where，how，why等等在从句中作时间、地点、方式、原因状在从句中作时间、地点、方式、原因状语等成分。语等成分。What we need is more water.(连接代词连接代词what在从句中作在从句中作need的宾语的宾语)我们需要的是更多的水。

60、我们需要的是更多的水。Whether we can arrive there on time depends on the traffic.我们是否能按时到达那里由交通情况而定。我们是否能按时到达那里由交通情况而定。When the delayed flight will take off depends much on the weather.延迟的航班什么时候起飞主要取决于天气状况。延迟的航班什么时候起飞主要取决于天气状况。Why the man hadnt reported the accident sooner was never clear.谁都不清楚那个人为什么没更早一点报告那起事

61、故。谁都不清楚那个人为什么没更早一点报告那起事故。Who the letter was from is still unknown.这封信是谁寄的尚不清楚。这封信是谁寄的尚不清楚。三、三、it作形式主语作形式主语当句子主语过长时，为保持句子平衡，避免头重脚轻，常把主语从句后置，当句子主语过长时，为保持句子平衡，避免头重脚轻，常把主语从句后置，而用形式主语而用形式主语it代替。代替。it作形式主语时常用于以下句型：作形式主语时常用于以下句型：句型句型说明说明It系动词形容系动词形容词主语从句词主语从句常用于此句型的形容词有常用于此句型的形容词有important，(un)likely，possi

62、ble，necessary，natural，wrong等。等。It系动词名词系动词名词主语从句主语从句常用于此句型的名词有常用于此句型的名词有a fact，an idea，an honour，a wonder，no wonder，a pity等。等。It系动词过去系动词过去分词主语从句分词主语从句常用于此句型的过去分词有常用于此句型的过去分词有known，proved，said，decided，suggested，thought等。等。It不及物动词不及物动词主语从句主语从句常用于此句型的动词有常用于此句型的动词有appear，happen，seem，occur，matter等。等。It is

63、 very important that a student(should)learn English well.学生学好英语很重要。学生学好英语很重要。It is suggested that the meeting(should)be put off.有人建议会议延期召开。有人建议会议延期召开。It depends on the weather whether they are going shopping today.他们今天是否去购物还得看天气情况。他们今天是否去购物还得看天气情况。For example，it can be proved that China has more peo

64、ple than any other country in the world.举例来说，中国人口比世界上其他任何国家的人口都多，这是可以得到举例来说，中国人口比世界上其他任何国家的人口都多，这是可以得到证实的。证实的。It is no wonder that your students have made such great progress.难怪你的学生们进步这么大。难怪你的学生们进步这么大。考点警示考点警示1.从句的语序：在任何情况下，主语从句都用陈述语序。从句的语序：在任何情况下，主语从句都用陈述语序。Whichever of you gets here first will get

65、 the prize.你们谁第一个到达这里谁就获奖。你们谁第一个到达这里谁就获奖。2.主谓一致主谓一致(1)从句作主语时，主句的谓语一般用单数形式；但从句作主语时，主句的谓语一般用单数形式；但what和和who引导主语从引导主语从句时，有时主句谓语的数应与主句中作表语的名词保持一致。句时，有时主句谓语的数应与主句中作表语的名词保持一致。When we shall have our sports meeting has not been decided.我们什么时候开运动会还没有确定。我们什么时候开运动会还没有确定。What they need are books.他们需要的是书。他们需要的是书

66、。(2)如果由如果由and连接两个或两个以上的主语从句作主语时，谓语动词用复数；连接两个或两个以上的主语从句作主语时，谓语动词用复数；由两个或多个连接词引导一个主语从句时，谓语动词用单数。由两个或多个连接词引导一个主语从句时，谓语动词用单数。When they will start and where they will go have not been decided yet.他们什么时候动身以及要去哪里还没定下来。他们什么时候动身以及要去哪里还没定下来。How and why he came to this city is a story of struggle and success.他如何及为什么来到这个城市是一个充满奋斗和成功的故事。他如何及为什么来到这个城市是一个充满奋斗和成功的故事。3.whether引导的主语从句，如果用了形式主语引导的主语从句，如果用了形式主语it，引导词，引导词whether可以换可以换成成if。如果。如果whether从句在句首或后面有从句在句首或后面有or not时，不能用时，不能用if替换。替换。Whether genetically-modi