【课件】Unit+4Discovering+Useful+Structures课件人教版（2019）必修第一册+.pptx

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1、Unit4NaturalDisastersDiscoveringUsefulStructureVocabulary1.burybury oneself in=be buried in 埋头于；专心于埋头于；专心于练习：练习：_ the old world and build a new one.Bury2.breathebreath n.呼吸呼吸out of breathe 气喘吁吁地气喘吁吁地hold ones breath 屏住呼吸屏住呼吸练习：练习：The air was so cold we could hardly _.breathe3.supplysupply sth.to sb.

2、=supply sb.with sth.给某人提供某物给某人提供某物练习：练习：They are at the end of their food _.supply4.survivesurvive on sth.=live on sth.靠靠存活存活练习：练习：The company has _ the recent upset in share prices.surviveLead-inFind and underline the restrictive attributive clauses in the sentences below.The Tangshan earthquake wa

3、s a terrible experience that my great grandma cannot forget.The couple who live next to us volunteered to help after the volcano eruption.The supplies which were provided to the disaster area were collected from around the country.Mr Li is an architect whose designs for the new town have won praise.

4、【要义详析】一、分类:定语从句可以分为限制性定语从句和非限制性定语从句。1.限制性定语从句它是先行词在意义上不可缺少的定语,如果去掉,主句的意思就不完整或失去意义。这种从句与主句的关系十分密切,书写时不可用逗号分开。如果关系代词在限制性定语从句中作宾语,关系代词通常可以省略。限制性定语从句作用限制性定语从句作用:修饰和限制先行词修饰和限制先行词 添加新信息添加新信息 增强语句或语段的衔接性增强语句或语段的衔接性*Shanghai is a city(that)Ive always wanted to visit.上海是我一直想参观的城市。*The old woman,who lives on

5、her own,has a cat for company.这个老妇人一个人住,养了一只猫陪伴她。二、关系代词的用法定语从句的关系代词有that,which,who,whom以及whose。*How do you like the film which/that was shown last Sunday?你认为上周日上映的电影怎么样?(指物,作主语)【名师点津】whose还是which关系代词在定语从句中作定语时,无论指人还是指物,都要用whose,而不能用which。*Thats the new machine whose parts are too small to be seen.那是

6、一台零件小到看不见的新机器。*Have you seen the film Titanic,whose leading actor is world-famous?你看过泰坦尼克号这部电影吗?它的男主角是世界著名的。【知识延伸】关系代词的用法与分类依据1.根据所引导的从句的限制性和非限制性;2.根据所替代的先行词是指人还是指物;3.根据它在从句中所充当的成分主语、宾语或定语。三、关系代词that与which的用法辨析1.只用that而不用which 的情况(1)先行词有形容词最高级修饰时*Henry is the most energetic young man that I have eve

7、r come across.亨利是我见过的最有活力的年轻人。(2)先行词有序数词修饰时*This is the third time that they have met.这是他们第三次见面。(3)先行词为all,much,few,little,everything,anything,nothing,none 等不定代词,或被不定代词修饰时*Nothing that the teacher does doesnt influence his students.老师所做的事情没有不影响到他的学生的。(4)先行词既有人又有物时*He talked about the schools and tea

8、chers that he had visited.他谈论了他拜访过的学校和老师。(5)先行词前面有the very,the only,the last,the same等词修饰时*This is the very room that I slept in that evening.这正是我那天晚上睡觉的房间。*This is the only thing that we can do now.这是我们现在唯一能做的事情。【名师点津】the same.that/as区别the same.that表示“同一个”(同一性)the same.as表示“类似的一个,而不是同一个”(相似性)*This

9、is the same watch that I lost.这就是我丢的那块手表。(同一个)*I have bought the same watch as you have.我买了一块和你一样的手表。(相似的,非同一个)(6)关系代词在限制性定语从句中作表语时*Our school is no longer the school that it used to be.我们的学校不再是以前的样子了。(7)句中其他位置已出现which,为避免重复,不用which而用that。*Which is the car that has overtaken us?超过我们的是哪辆车?2.只用which 而

10、不用that 的情况(1)引导非限制性定语从句时*I borrowed the book Sherlock Holmes from the library last week,which my classmates recommended to me.我上周从图书馆借了夏洛克福尔摩斯这本书,这是我的同学推荐给我的。(2)在定语从句中,关系代词前有介词时*I was put in a position in which I had to accept I was less important.我被置于不得不接受我不重要的境地。指代人指代人指代物指代物主语主语who/thatwhich/that宾

11、语宾语关系代词可省关系代词可省whom/who/thatwhich/that定语定语“某人某人的的/某物的某物的”whose whose whosewho;thatthat;/which;thatwhosewhomwho;thatFinishtheexercise限制性定语从句小结1.1.作用作用：修饰和限制先行词修饰和限制先行词2.2.结构：结构：先行词先行词+关系词关系词+从句从句 先行词先行词:被定语从句修饰的词。被定语从句修饰的词。关系词关系词:关系代词关系代词(that,which,who,whom,whose)(that,which,who,whom,whose)*关系副词关系副词(where,when,why)(where,when,why)。Thankyou