2014年高二英语（人教版选修8）教学精品课件：UNIT1 PERIOD Ⅲ.ppt

1、教师用书独具演示教学目标(1)熟记学案中所列出的单词和短语。(2)通过学案中所给出的重点单词和重点短语的学习，让学生能够正确理解和使用这些单词和短语，能够运用这些词语造句。(3)通过对语法的教学让学生能够理解并能够运用这些语法知识，体会并复习名词性从句作主语、宾语和表语的用法和含义。教学地位语法是学生感到比较难以掌握的东西。让学生正确理解和掌握语法知识是让学生学好英语的关键，所以应给学生创设一个语境，让学生理解该语法的应用，而不要让学生死记硬背语法条文，应从理解的基础上去运用这些语法。新课导入建议通过对学生作业的检查导入本堂新课。演示结束occur vi.发生；出现It didnt occur

2、 to me that.(教材P5)我起初没想到The tragedy occurred only minutes after takeoff.这一悲剧在起飞后几分钟内就发生了。It occurs to sb.that.某人想起It occurs to sb.to do.某人想起做occur to sb.(主意)浮现于脑海中；被想到；(某人)想到It occurred to him that he hadnt eaten.他想到他还没吃东西。It did not occur to me to check my insurance policy.我没想到要核对我的保险单。occur比较正式的用语

3、，可用于具体或抽象的事物，通常指按计划或规律在较为确定的时间“发生”的事，在表示具体的事物时，可与happen换用。但occur还可表示“某人想起”。happen常指具体事件的发生，特别指那些偶然的或未能预见的“发生”。另外，happen还有“碰巧”之意。take place通常指“(某事)按计划进行或按计划发生”。另外，take place还有“举行”之意。【对接高考】(2012江西高考)It suddenly occurred to him _ he had left his keys in the office.AwhetherBwhereCwhichDthat【解析】句意：他突然想到他

4、把钥匙忘在办公室里了。It occurs to sb.that.意为“某人突然想到某事”，其中it是形式主语，后面的that从句是真正的主语。其他选项没有此用法。【答案】D【答 案】happen/occuroccurtaken placetake placehappenedhappened/occurred观察下列从Reading中选取的句子，体会名词性从句作主语、宾语和表语的用法。Exactly when the first people arrived in what we now know as California，no one really knows.However，it is l

5、ikely that Native Americans were living in California at least fifteen thousand years ago.Scientists believe(that)these settlers crossed the Bering Strait in the Arctic to America by means of a land bridge which existed in prehistoric times.That is why today over 40%of Californians speak Spanish as

6、a first or second language.自我总结1.名词性从句必须是_语序，引导词位于从句_。2.主语从句通常以_ 做形式主语出现。3.引导宾语从句的_ 常可以省略，并且注意_，当主句为过去时时，从句时态一定往前推移，不可出现现在时或现在完成时。【答案】1.陈述；句首 2.it3.that；时态呼应复习名词性从句作主语、宾语和表语一、概说名词性从句，即指具有名词性质的从句，它包括主语从句、宾语从句、表语从句和同位语从句。名词性从句是高中英语学习中的一个语法重点，也是历年高考重点考查的内容之一。学习名词性从句主要应注意其引导词的用法与区别，从句的词序以及名词性从句与其他从句的区别等

7、。二、主语从句1主语从句的引导词主语从句通常由连词that和whether、连接代词或连接副词引导。That he is still alive is a wonder.他还活着，真是奇迹。What he wants to read now are some magazines.现在他想读的是一些杂志。Whether well go camping tomorrow depends on the weather.明天我们是否去野营要看天气。2主语从句与形式主语it有时为了考虑句子平衡，通常在主语从句处使用形式主语it，而将真正的主语从句移至句末。这分三种情况。(1)对于以连词that引导的主语

8、从句，通常用形式主语代主语从句：Its a pity that he didnt come.很遗憾他没来。(2)对于以连接代词(副词)引导的主语从句，可以使用形式主语代主语从句，也可直接在句首使用主语从句。Whether they would support us was a problem.他们是否会支持我们还是一个问题。It was a problem whether they would support us.他们是否会支持我们还是一个问题。(3)what引导的主语从句，通常不用形式主语，总是主语从句放在句首。What we need is money.我们需要的是钱。What I wa

9、nt to know is this.我想知道的就是这一点。(4)如果句子是疑问句，则必须用带形式主语it的结构。Is it true that he is the girls father?他是那女孩的父亲，是真的吗？Is it still a question when we shall have our sports meet?我们什么时候开运动会还是个问题吗？3连词that的省略问题引导主语从句的连词that 有时可省，有时不能省，其原则是：若that引导的主语从句直接位于句首，则that不能省略；若that引导的主语从句位于句末，而在句首使用了形式主语it，that则可以省略。Tha

10、t you didnt go to the talk was a pity.很遗憾你没去听报告。(that不可省)It was a pity(that)you didnt go to the talk.很遗憾你没去听报告。(that可省)三、宾语从句1宾语从句的引导词宾语从句通常由连词that和whether(if)、连接代词或连接副词引导。We believe that he is honest.我们相信他是诚实的。I dont know whether hell arrive in time.我不知道他是否能及时到。I dont know who(m)you mean.我不知道你指谁。He

11、 asked why he had to go alone.他问他为什么必须一个人去。Please tell me which you like.告诉我你喜欢哪一个。She has got what she wanted.她要的东西得到了。【提示】有时介词后可跟一个宾语从句(但介词后通常不接that和if引导的宾语从句)。From what you say，he is right.根据你所说的，他是对的。有极个别介词(如but，except)可接that引导的宾语从句。She remembered nothing about him except that his hair was black

12、.她对他什么都不记得，只记得他的头发是黑的。2宾语从句与形式宾语it当宾语从句后跟有宾语补足语时，通常在宾语从句处使用形式宾语it，而将真正的宾语从句移至句末。I think it best that you should stay here.我认为你最好住这儿。He hasnt made it known when he is going to get married.他还没宣布他何时结婚。3连词that的省略问题引导宾语从句的连词that 通常可以省略。She said(that)she would come to the meeting.她说过要来开会的。I promise you(th

13、at)I will be there.我答应你我会去。【提示】有时为了强调，that引导的宾语从句可位于句首，此时that不可省略：That she is a good girl I know.她是一个好姑娘，我是知道的。4宾语从句与否定转移当动词think，believe，suppose，expect，imagine后接一个表示否定意义的宾语从句时，其否定通常转移到主语。I dont suppose that it is true.我认为那不是真的。I dont imagine that he will come.我想他不会来的。四、表语从句1表语从句的引导词引导表语从句的词有连词that，

14、whether，连接代词和连接副词，以及as if，as though，because等连词。The fact is that he doesnt really try.事实是他没有做真正的努力。The question is whether the film is worth seeing.问题是这部电影是否值得看。The problem is how we can find him.问题是我们如何找到他。That was when I was fifteen.这是我15岁时发生的事。It is because I love you too much.那是因为我太爱你了。【提示】whethe

15、r 可引导表语从句，但与之同义的if却通常不用于引导表语从句；because 可引导表语从句，但与之同义的since，as，for等也不用于引导表语从句。2连词that的省略问题引导表语从句的that通常不省略，但在口语或非正式文体中有时也可省略。My idea is(that)we should do it right away.我的意见是我们应该马上干。The trouble is(that)he is ill.糟糕的是他病了。五、名词性从句中两个易错问题1词序问题名词性从句总是用陈述句词序，而不能使用疑问句词序，尤其是当名词性从句由“疑问词”引导时，不能受疑问句的影响而误用疑问句词序。误

16、：I didnt know where did he live.正：I didnt know where he lived.我不知道他住哪儿。误：Who will he marry remains unknown.正：Who he will marry remains unknown.他同谁结婚还不知道。2时态问题由于由when引导的时间状语从句和以if引导的条件状语从句要用现在时表示将来意义，而不能直接使用将来时态，所以许多同学容易受此影响在when和if引导名词性从句时也用现在时表示将来意义。另外，当主句为过去时态时，宾语从句通常要用过去的某种时态与之呼应(表客观真理时除外)。The te

17、acher told us that he knew everything.老师告诉我们他知道一切。The teacher told us that light travels faster than sound.老师告诉我们光比声音传播得快。【巧学妙记】学习宾从三注意，时态语序和连词。时态主从要呼应：主句若为现在时，从句时态随句意；主句若为过去时，从句时态变过去；宾从若是表真理，时态不变无质疑。语序要用陈述序，切莫照搬疑问句。That连接陈述句，省与不省要注意。从句若表“是否”时，if/whether要慎记。特殊问句作宾语，仍用原来疑问词。三个问题需记牢，切莫丢东忘了西。.单项填空1(201

18、3开封高二检测)_ he had forgotten to take his notebook.AThat occurred to himBTo him that occurredCHe occurred that DIt occurred to him that【解析】本题检测的是occur的用法和it做形式主语。(an idea)occur to sb.是“(主意)浮现在脑中、被想起”的意思。句意：他想起忘带笔记本了。【答案】D2(2013北京高考)Experts believe_people can waste less food by shopping only when it is

19、necessary.AwhyBwhereCthatDwhat【解析】题干的意思是：专家们认为必要的时候才购物可以减少食物的浪费。分析结构可知，此处是experts believe.作主句，空格处引导宾语从句，从句不缺少成分，故用that。why在句中作原因状语；where作地点状语；what作主语、宾语或表语。故正确答案为C项。分析清楚句子结构是解题关键。【答案】C3(2013安 徽 高 考)From space，the earth looks blue.This is _ about seventyone percent of its surface is covered by water.

20、AwhyBhowCbecause Dwhether【解析】本题考查表语从句的引导词。句意：从太空看，地球是蓝色的。这是因为它表面大约71%被水所覆盖。首先分析前后两句之间的逻辑关系，此处为“前果后因”，使用because，故选C项。【答案】C4(2012福建高考)We promise _ attends the party a chance to have a photo taken with the movie star.AwhoBwhomCwhoever Dwhomever【解析】考查名词性从句。句意：我们承诺给任何出席晚会的人一个与那个影星合影的机会。句中whoever引导宾语从句(an

21、yone who引导的定语从句)。【答案】C5(2012北京高考)Jerry did not regret giving the comment but felt _ he could have expressed it differently.AwhyBhowCthatDwhether【解析】考查宾语从句的连接词。宾语从句不缺少成分，故用that引导。【答案】C6_ worries me a lot is that I keep forgetting what I have just done.AAsBWhatCThatDIt【解析】句意：使我很担忧的是我总是忘记我刚刚做了什么。所选项引导主

22、语从句并在从句中作主语，故用what。as不引导名词性从句；that引导名词性从句时不在从句中作任何成分；it不引导从句。【答案】B7 We believe _ human beings cant live without animals，and _ it is quite necessary to protect those rare animals.Athat；不填 B不填；不填C不填；that Dwhat；that【解析】句意：我们相信没有动物，人类将无法生存，也相信现在很有必要去保护那些珍稀动物。所选项引导的均是believe 后的宾语从句，且不在从句中作任何成分，故用that；动词后

23、有两个或两个以上由that引导的宾语从句时，只有第一个that可以省略，故选C。【答案】C8The boss is thinking about _ he should open another branch company.Awhether BifCthat Dwhat【解析】句意：老板正在考虑是否要再开一家分公司。所选项引导宾语从句，且不在句中作任何成分，意为“是否”，故用whether。if不能引导介词的宾语从句；that引导名词性从句时，在句中没有任何意义；what引导名词性从句时，在句中作主语、宾语、表语等成分。【答案】A9(2013济 宁 高 二 质 检)He failed to

24、attend the meeting.The reason was _ he missed the first bus.Abecause BthatCwhy Dhow【解析】句意：他没能来参加会议，原因是他没赶上第一班公交车。所选项引导表语从句，且不在句中作任何成分，故用that。主语为名词reason时，表语从句中的连接词要用that，而不能用because或why；how常作方式状语。【答案】B10 Cindy shut the door heavily and burst into tears.No one in the office knew _ she was so angry.Aw

25、here BwhetherCthat Dwhy【解析】句意：辛迪重重地关上了门，并且大哭了起来。办公室没有一个人知道她为什么这么生气。此处why表示原因，引导knew的宾语从句，符合题意。where表示地点；whether意为“是否”，that没有实际意义，二者都不在名词性从句中作成分。【答案】D.完成句子1_(英语晚会将在哪里举行)has not yet been announced.2It is known to us _(他是如何成为一名作家的)3_(他要跟我们说什么)is not clear.4He has told me _(他明天要去上海)5I insist _(要她单独工作)6I

26、 want to know _(他告诉了你什么)7I wonder _(他来还是不来)8The fact is _(我们已经输了这场比赛)9Thats _(正是我想要的)10This is _(我们的问题所在)【答案】1.Where the English evening will be held2how he became a writer3.What he wants to tell us4.that he will go to Shanghai tomorrow5.that she(should)do her work alone6.what he has told you 7whether he will come or not8.that we have lost the game9.just what I want10.where our problem lies