【课件】Unit+5+Discovering+Useful+Structures+课件人教版(2019)必修第一册.pptx
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1、人教版(2019)必修一Unit 5 Languages Around the WorldDiscovering Useful StructuresDescribe your favourite thingsLearning objectivesBy the end of this section,you will be able to:1.identifyand summarise the function of relative adverbs in restrictive relative clauses;2.describe one of your favourite memories
2、 with restrictive relative clauses.Review the grammar you learnt in the last unit.modify a noun or pronouncan be introduced by relative pronouns1.There were deep cracks that appeared in the well walls.2.The number of people who were killed or badly injured in the quake was more than 400,000.3.The su
3、pplies which were provided to the disaster area were collected from around the country.L e a d-i nrestrictive relative clausesprovide specific informationthat,which,who,whom,whosePresentationLook at these sentences and underline the restrictive relative clauses.What kind of information does each cla
4、use communicate?It was a time when people were divided geographically.Information:a time for an eventEmperor Qinshihuang united the seven major states into one unified countrywhere the Chinese writing system began to develop in one direction.Information:a location for an eventThere are many reasons
5、why people learn a foreign language.Information:a reason for an actionThese were animal bones and shells on which symbols were carved by ancientChinese people.Information:a location for an action限制性定语从句关系副词引导的定语从句1.when引导定语从句的用法(1)当先行词是表示时间的名词(如time,day,year,month,week等),且关 系词在从句中作时间状语时,定语从句用 when 引
6、导。(2)when可以换成“介词+which”。The first of October,1949,is the day when(=on which)the Peoples Republic of China was founded.1949年10月1日是中华人民共和国成立的日子。Ill never forget the time when(=during which)we visited Xian.我永远不会忘记我们参观西安的那段时间。Do you remember the day when(=on which)we first met?你还记得我们第一次见面的那一天吗?注意当先行词是表示
7、时间的名词时,既可以用when引导定语从句,也可以用that或 which引导定语从句,关键要看关系词在定语从句中作何种成分。若关系词在 定语从句中充当状语,则用 when引导;若关系词在定语从句中充当主语或宾 语,则用that或which引导。Do you still remember the days(that/which)we spent together on the farm?你还记得我们一起在农场度过的那些日子吗?(that 或which 作spent 的宾语)Do you still remember the days when we chatted with each othe
8、r all night?你还记得我们整夜聊天的那些日子吗?(when在从句中作状语)2.where引导定语从句的用法(1)当先行词是表示具体地点的名词(如place,room,mountain,airport等)或表示抽象地点的名词(如case,state,condition,point,situation等),且关系词在从句中作地点状语时,定语从句用where引导。(2)where可以换成“介词+which”。This is the place where(=at/in which)we first met.这是我们第一次见面的地方。The hotel where(=at/in which)
9、we stayed was very clean.我们住的旅馆很干净。I recently went back to the town where(=in which)my father was born.我最近回到了我父亲出生的那个城镇。Id like to live in a country where(=in which)there is plenty of sunshine.我想住在一个阳光充足的国家。注意当先行词为表示地点的名词时,如果关系词在定语从句中作主语或宾语,则用that或which引导定语从句。His father works in a factory which/that
10、 makes radio parts.他的父亲在一家制造收音机零件的工厂里工作。辨析where引导的定语从句和状语从句(1)where引导定语从句时,为关系副词,在定语从句中作地点状语,其前有一 个表示地点的先行词。此时,where可以换成“介词+which”结构。where引导的定语从句只能位于主句之后或句中,不能位于句首。Is there a shop around where(=in which)we can buy some fruit?附近有没有一个商店可以让我们在里面买些水果?(2)where引导状语从句时,为从属连词。where引导的地点状语从句修饰主句 中的谓语动词,where
11、前面没有表示地点的名词。此时,where不能换成“介词+which”结构。where引导的地点状语从句可位于主句之前,也可位于 主句之后。Where there is a will,there is a way.We should go where we are needed.(谚)有志者,事竟成。我们应该到需要我们的地方去。3.why引导定语从句的用法(1)当先行词是表示原因的名词reason,且关系词在从句中作原因状语时,定语 从句用why引导,且只能引导限制性定语从句。(2)why可以用for which 来代替。Thats the reason why(=for which)he mi
12、ssed his bus.那就是他没赶上公共汽车的原因。I didnt get a pay rise,but this wasnt the reason why(=for which)I left.我没有得到加薪,但这并不是我离开的原因。注意若先行词为reason,且关系词在定语从句中不作状语,而是充当主语或宾语,则用that或which引导定语从句。The reason that he told me yesterday is a lie.昨天他告诉我的理由是个谎言。“介词+关系代词”引导的定语从句1.关系代词的选择“介词+关系代词”既可以引导限制性定语从句,也可以引导非限制性定语从 句。在
13、此结构中,先行词指人时关系代词用whom,不可用who/that;先行词指 物时关系代词用which不能用 that。This is the student for whom I bought a book.This is the ship by which I went to Shanghai.这就是我去上海所乘的船。The film in which he played the leading role was a great success.他主演的那部电影非常成功。这就是我给买书的那个学生。2.介词的选择(1)根据定语从句中的谓语动词与介词的习惯搭配来确定介词。Is this the
14、car for which you paid a high price?这就是你花高价买的那辆车吗?(pay.for sth.)In the dark street,there wasnt a single person to whom she could turn for help.在漆黑的街上,没有一个她可以求助的人。(turn to sb.for help)(2)根据定语从句中的主要形容词与介词的习惯搭配来确定介词。He brought the result with which the boss was satisfied.他带来了令老板满意的结果。(be satisfied with
15、)(3)根据先行词与介词的习惯搭配来确定介词。先行词往往是表示时间、地点、原因、方式等的词。Can you tell me the way in which the machine works?你能告诉我这台机器的工作原理吗?(in the way)I cant remember the age at which he won the prize.我记不起他获奖时的年龄了。(at the age)(4)根据句子的意思来确定介词。有些句子中,定语从句中的谓语动词/主要形容词与介词也不能构成固定搭配,这时,需要根据句子所要表达的意思来 选择介词。This is the pilot with who
16、m my brother has worked for ten years.这就是和我弟弟一起工作了十年的那位飞行员。This kind of colorless gas without which we cant live is called oxygen.这种无色气体被称作氧气,没有它我们就不能生存。3.介词可以后移,此时关系代词可以省略(省略时,介词必须后移)。This is the book for which you asked.这是你要的那本书。This is the book(which/that)you asked for.这是你要的那本书。注意有些固定的动词短语一般不能拆开,
17、介词一般只能放在动词的后面。4.在“介词+关系代词”结构中,介词也可换成介词短语,如by means of,because of,at the foot of,at the back of,in front of,on the top of 等。若介词短 语表示位置,则定语从句往往用倒装语序。Sound is a tool by means of which people communicate with each other.声音是人们互相交流的工具。They stayed in a big hotel in front of which was a garden.他们住在一家大旅馆里,旅馆
18、前面是一个花园。P r a c t i c eUnderline the clauses in the sentences and decide whether they are restrictive relative clauses or object clauses.Relative clause1.The reason why he found German so difficult was because of its grammar.Object clause2.A:Have you decided where we should go for our holiday yet?Re
19、lative clauseB:After learning for two years,I really want to visit a country where French is spoken.Relative clause3.According to an old story,there was once a time when the whole world spoke only one language.Object clause4.This passage introduces how Chinese characters have changed over time.Fill
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