单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,#,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Unit 4 Amazing Science,Unit 4 Amazing Science,Topic 3,China is the third nation that sent a person into space.,Section C,课件,2,Topic 3,The importance of computers,The importance of computers,Read the article silently then answer:,Is everything we read on the Internet true or good for us?,Read the article silently then,Read 1a again and finish the task below:,Mark T(True)or F(Flase).,(1)Computers were invented in China in the 1950s.(),(2)Robots are controlled by human brains.(),(3)Computers are only used to place orders.(),(4)People communicate by sending e-mails and chatting,online.(),(5)Everything we read on the Internet is true and good for,us.(),F,F,F,F,T,Read 1a again and finish the t,Find the topic sentence of each paragraph while listening to 1a.,1.Since computers were invented in the USA in the 1950s,they have become very important in many areas of work and leisure.,2.Since the Internet came into being,peoples lives at home have been changed,too.,3.Computers have improved our lives,but they have brought problems,too.,Find the topic sentence of eac,Complete the following diagram.,computers,usage,problem,work,daily life,_ of a spaceship.,help doctors _.,_ in factories.,help businessmen _.,play games and _.,_ and _ at home.,_ by sending e-mails and _.,get headaches or _.,dont have enough time _.,something on Internet is not _.,control the speed and direction,find diseases easily,control the robots,place and cancel orders,watch movies,do shopping,do business,communicate,chatting online,sore eyes,to study or exercise,true or good,Complete the following diagram,1.This is the gentleman who helped me out of the trouble.,2.The building which stands near the river is our school.,3.Do you know the boy whose bicycle was broken just now?,4.The farm(that)we visited last Sunday was located in the suburbs of Beijing.,1.This is the gentleman who h,定语从句,定语从句,概 念,什么是定语从句：,在复合句中，修饰某一名词或代词的从句叫定语从句。其作用是修饰主句中的某一名词或代词，修饰的名词或代词叫先行词。,e.g.Do you know the man,（,who came to see Xiaowang this morning?,）,概 念什么是定语从句：,定语从句放在先行词之后，先行词由关系代,词或关系副词 引导，关系词放在它们中间。,关系代词：,who,whom,that,which,whose,关系副词：,when,where,why,e.g.,1.He is a man whom we should all learn from.,他是一个我们都应当学习的人,2.I still remember the day when I first came to,定语从句的翻译。,要 点：,注 意：,定语从句放在先行词之后，先行词由关系代要 点：注 意：,定语从句（,2,）引导定语从句的词叫关系代词以及关系副词,关系词,先行词,在从句中成分,who,人,主语，宾语,whom,人,宾语,whose,人,定语,which,物,主语，宾语,that,物，人,主语，宾语,when,时间,状语,where,地点,状语,why,原因,状语,定语从句（2）引导定语从句的词叫关系代词以及关系副词关系词,关系代词,:,1.who,指人,作主语或宾语,(,作宾语可省略）,The man who I talked with is our teacher.,A person who steals things is called a thief.,2.whom,指人,作宾语,(,作宾语可省略,如介词提前则不能省,),The man(whom/who)I nodded to is Mr.Li.,The man to whom I nodded is Professor Li.,关系代词:1.who指人,作主语或宾语(作宾语可省略）,3.which,指物，作主语或宾语,(,作宾语可省,略,如介词提前则不能省,),These are the trees which were planted,last year.,This recorder,（,which,）,he is using is,made in Japan.,Is this the library(which)you borrow books from?,Is this the library from which you borrow,books?,3.which 指物，作主语或宾语(作宾语可省These,4.that,指人,/,物，作主语或宾语,(,作宾语可省略）,A plane is a machine.It can fly.,A plane is a machine that can fly.,He is the man.I told you about him.,He is the man(that)I told you about.,4.that 指人/物，作主语或宾语(作宾语可省略）,Whose,的用法,指人或物，表示所属关系,I dont want to hire the boy whose father is now in prison.,Look at the house whose roof is red.,Whose的用法指人或物，表示所属关系I dont wan,That&which,下列情况中只能使用,that,1,先行词是,everything,anything,等不定代词或是,all,much,few,little,以及被其修饰,Everything that can be done has been done.,There are few books we can read.,That&which下列情况中只能使用 that1 先,2,先行词被,the only,the very,the last,the very,及序数词修饰,This is the only food that I can find for you.,His composition was the second one that was handed in.,3,先行词被形容词或副词的最高级修饰时,This is the most interesting film that I have ever seen.,2 先行词被the only,the very,the,4,先行词人物共存时,They talked for half an hour of things and persons that they remembered in the school.,4 先行词人物共存时They talked for hal,下列情况中只能使用,which,a),引导非限定性定语从句时。例如：,（错）,The tree,that is four hundred years old,is very famous here.,改正：,that,改为,which.,b),介词后不能用,that,。例如：,We depend on the land from which we get our food.,我们依赖土地获得食物。,下列情况中只能使用 whicha)引导非限定性定语从句时。,The man to whom I nodded is Professor Li.,如果介词提前，作宾语的关系代词不能省略,指物，只用,which,指人,只用,whom,Is this the library from which you borrow books?,Is this the library(which)you borrow books from?,The man(whom/who)I nodded to is Mr.Li.,The man to whom I nodded is Pr,2,介词,+,关系代词,Prep+which/whom,The cha