2021学年Unit 3 The world of science教课ppt课件

这是一份2021学年Unit 3 The world of science教课ppt课件，共23页。PPT课件主要包含了限制性　 ，非限制性　 ，限制性 ，who　 ，where　 ，whowhom　 ，which ，whose　 ，when ，which　 等内容，欢迎下载使用。

一、从文中找出下列句子,分析它们是限制性定语从句还是非限制性定语从句1.Ma Zedng wrte a pem in which he dreamed f “walls f stne t hld back cluds and rain till a smth lake rises in the narrw grges” pwer f the Yangtze River,which is the wrld’s third lngest river,has been harnessed by the Three Grges Three Grges Dam,which is the biggest cnstructin prject in China since the building f the Great Wall and the Grand Canal,has been built t cntrl flding and prvide hydr-electric pwer fr the central regin f China.
4.Sun Yat-sen,wh was the leader f the 1911 Revlutin,first suggested the idea f a dam acrss the Yangtze River in than a millin peple wh lived in the regin have mved frm their which引导　　　　　定语从句。 2.which引导　　　　　定语从句。 3.which引导　　　　　定语从句。 4.wh引导　　　　　定语从句。 5.wh引导　　　　　定语从句。 
二、用合适的关系词填空1.Li Ping,　　　　　 is my gd friend,des well in English. 2.He went t Beijing,　　　　　 he became successful ten years later. 3.His mther,　　　　　 he lved dearly,went abrad. 4.This machine,　　　　　 he has lked after fr many years,is still wrking perfectly. 5.Linda,　　　　　 parents had died,had t make a living by herself. 6.We will put ff the picnic until May 1st,　　　　　 we’ll be free. 
三、翻译下列句子1.They went t Lndn,where they lived fr six mnths. 2.The letter is frm my yunger sister,wh is wrking in Beijing. 3.I saw a gd film,which was abut the Lng March. 4.His keys were left in the ffice,as was ften the case. 5.He suddenly fell ill,which prevented him frm ging t schl. 
他们去了伦敦,在那里过了六个月。
这封信是我妹妹写来的,她在北京工作。
我看了一部好电影,是有关长征的。
他的钥匙被遗忘在办公室了,这是常事。
他突然生病了,这使得他无法去上学。
1.If yu take away the relative clauses,d the sentences still make sense?如果你把关系从句去掉,这些句子仍有意义吗?★考点:make sense有意义;有道理These sentences dn’t make sense t me.I can’t understand them.在我看来这些句子讲不通,我看不懂它们。考点延伸阅读下列句子,体会sense的相关短语及含义①Can yu make sense f this pem?你能理解这首诗吗?短语:make sense f　含义:理解……的意义 
②He has a sense f humur.他有幽默感。短语:have a sense f　含义:有……感 ③There is n sense in arguing with him.He wuld nt listen.和他争论没有意义,他不会听的。短语:There is n sense in ding sth.　含义:做某事是没有意义的 ④What yu say is true in a sense.从某种意义上来讲,你说的是真的。短语:in a sense　含义:在某种意义上 ⑤In n sense shall I lse heart when faced with difficulties.在困难面前,我决不能失去信心。短语:in n sense　含义:决不 
2.Grammar★考点一:非限制性定语从句Our guide,wh was a French Canadian,was an excellent ck.我们的向导擅长烹调,他是一个法裔加拿大人。These apple trees,which I planted three years ag,grw well.这些苹果树是我三年前栽的,它们长势旺盛。
考点延伸1)由关系代词引导的非限制性定语从句,当先行词指人时,通常用wh,whm,whse来引导;当先行词指物时,通常用which来引导。关系代词不可以省略。阅读下列句子,用适当的关系代词填空①Her mther,　　　　　 lved her very much,died last year. 很爱她的母亲去年去世了。②Ftball,　　　　　 is a very interesting game,is played all ver the wrld. 全世界的人们都在踢足球,这是一项非常有趣的运动。
③Peter,　　　　　 yu met in Lndn,is nw back in Paris. 彼得现在回巴黎了,你在伦敦见过他。④The by,　　　　　 father is an engineer,studies very hard. 那位小男孩学习很努力,他的父亲是位工程师。
2)由关系副词引导的非限制性定语从句,当先行词指地点时,用关系副词where来引导非限制性定语从句;指时间时,用when来引导。阅读下列句子,用适当的关系副词填空①Many children g t a day care centre,　　　　　 they are taken gd care f. 很多孩子上日间托儿所,在那儿他们受到很好的照顾。②The stry happened in 2000,　　　　　 she was still a child. 那个故事发生在2000年,那时她还是个孩子。③We walked dwn the village street,　　　　　 they were having market day. 我们沿着村里的大街向前走去,村民们正在那里赶集。
★考点二:限制性定语从句与非限制性定语从句的区别Clck is a kind f instrument which can tell peple time.钟表是一种能够告诉人们时间的仪器。Mr Zhang,wh came t see me yesterday,is an ld friend f mine.张先生昨天来看我了,他是我的一位老朋友。
考点延伸1)限制性定语从句对所修饰的词或主句加以限制,表示“……的人(或东西)”,限制性定语从句描述的是主句不可缺少的一部分;非限制性定语从句对所修饰的词或主句没有限制作用,而只是补充、解释和说明,通常都有一个逗号把它和句子的其他部分分开,在译成中文时,这个从句常译成一个并列句。Miss Li is the persn (wh/that/whm) yu’ve been expecting t meet.李小姐就是你一直想见的那个人。This is Miss Li,whm/wh yu’ve been expecting t meet.这位是李小姐,她就是你一直想见的那个人。
2)在限制性定语从句中,that可代替wh/whm/which,关系代词做宾语时可省略;在非限制性定语从句中,不能用that引导,关系代词做宾语时也不能省略。The persn (that/wh/whm) I just talked t is Tm.刚才和我谈话的那个人就是汤姆。There are 30 chairs in the hall,mst f which are new.大厅里有30把椅子,大部分都是新的。3)当先行词是专有名词或由物主代词和指示代词修饰时,其后的定语从句通常是非限制性的。This nvel,which I have read twice,is very mving.这本小说很感人,我读了两遍。My huse,which I bught last year,has gt a lvely garden.我去年买的房子有一个漂亮的花园。
4)非限制性定语从句还能将整个主句作为先行词,对其进行修饰,这时从句谓语动词要用第三人称单数形式。My sn failed again in the exam,which makes me very angry.我儿子考试又不及格了,这让我很生气。He says he is the best f all,which causes them very unhappy.他说他是所有的人中最优秀的,这使他们很不高兴。注意:(1)关系代词that和关系副词why不能引导非限制性定语从句。(2)as或which引导的非限制性定语从句,可以修饰整个主句或主句的一部分。as引导的非限制性定语从句还可以放在主句之前,而which引导的非限制性定语从句要放在主句之后。(3)as引导定语从句时,意为“正如……”;which引导定语从句时,意为“这就是……”。
用as或which填空①　　　　　 has been annunced,we shuld have ur final exams next mnth. 正如宣布的那样,我们下个月要进行期末考试。②　　　　　 is knwn t all,smking is harmful t ur health. 众所周知,吸烟有害健康。③He turned ut t be very successful,　　　　　 was beynd ur expectatin. 结果他非常成功,这是我们所没有预料到的。
★考点三:定语从句的省略考点延伸在有些含有定语从句的复合句中,由于句式结构复杂,不容易理解,这就需要使用省略形式,使复杂的结构更加简单化,这样可以更好地帮助我们理解。The bys helped the peple (wh were) hurt in the accident.那些男孩子救助了在事故中受伤的人们。The child (wh is) playing is my brther.正在玩耍的小孩是我弟弟。
考点延伸1)在限制性定语从句中,当关系代词在从句中做宾语时,关系代词可以省略。找出下列句子中可以省略的词①The dam that/which we saw in the film was the Three Grges Dam.我们在那部电影中看到的大坝是三峡大坝。可以省略　　　　　  ②The man that/wh/whm I came acrss just nw is my ld friend.我刚刚遇见的那个人是我的老朋友。可以省略　　　　　  
that/which　
that/wh/whm
2)在限制性定语从句中,当关系代词在从句中做介词的宾语而介词在谓语动词之后时,关系代词可以省略。找出下列句子中可以省略的词①I have been lking fr a man wh/whm/that my father wrked with 20 years ag.我一直在寻找20年前和我父亲一起工作的一个人。可以省略　　　　 ②He wanted t hld n t the huse which/that his grandparents lived in.他不想卖掉他祖父母曾经住过的房子。可以省略　　　　 
wh/whm/that　
which/that
3)有些定语从句可以缩略为各种短语,如分词短语、形容词短语、名词短语、介词短语及动词不定式短语等,且句意不受影响。找出下列句子中可以省略的词①I have heard the reprt which was made by Prfessr Wang.我听过王教授做的报告。可以省略　　　　 ②I knw the men wh are sitting in that car.我认识坐在那辆汽车里的那些人。可以省略　　　　 ③Yu shuld nt cut dwn the tree which was planted last spring.你不应该砍掉去年刚种的那棵树。可以省略　　　　 
which was