UNIT 5LANGUAGES AROUND THE WORLD Section Discovering Useful Structures UNIT 5LANGUAGES AROUND THE WORLD英语必修第一册(配人教版) 观察并探究课文原句There are many reasons why people learn a foreign language.That was a time when the Chinese people were divided geographically.Emperor Qinshihuang united the seven major states into one unified country where the Chinese writing system began to develop in one direction.These were animal bones and shells on which symbols were carved by ancient Chinese people.限制性定语从句(二)UNIT 5LANGUAGES AROUND THE WORLD英语必修第一册(配人教版) 自我归纳(1)先行词是表_的名词reason, why在从句中作_状语。(2)先行词是表_的名词time, when在从句中作_状语。(3)先行词是表_的名词country, where在从句中作_状语。(4)先 行 词 是 名 词 bones and shells, 在 which前 加 了 介 词 _， 构 成 ：_(on, in.) _(which/whose/whom)引导的定语从句。原因原因时间时间地点地点on介词关系代词UNIT 5LANGUAGES AROUND THE WORLD英语必修第一册(配人教版) 一、关系副词的用法关系词先行词表示从句成分例句备注关系副词when时间时间状语I will never forget the day when we met there.可用onwhich代替where地点地点状语This is the house where I was born.可用inwhich代替why原因原因状语I cant imagine the reason why he turned down my offer.可用forwhich代替UNIT 5LANGUAGES AROUND THE WORLD英语必修第一册(配人教版) 基本用法关系副词起连接主句和从句的作用，又在从句中作状语，when, where和why分别表示时间、地点和原因。1when在从句中作时间状语。常用on which, in which, at which, during which等代替。April the first is the day when people make fun of others.April the first is the day on which people make fun of others.2where在从句中作地点状语。常可由in which, on which, at which等取代。This is the house where he lived two years ago.This is the house in which he lived two years ago.UNIT 5LANGUAGES AROUND THE WORLD英语必修第一册(配人教版) 3whywhy在定语从句中作原因状语。可用for which代替。why不可引导非限制性定语从句，此时可用for which代替。This is the reason why he went away.This is the reason for which he went away.点津不管先行词表示的是时间、地点还是原因，只要在从句中作主语、宾语或表语，引导词就要用关系代词which或that。UNIT 5LANGUAGES AROUND THE WORLD英语必修第一册(配人教版) Ill never forget the days (which/that) we spent in the small village.我永远忘不了我们在那个小村庄度过的那些日子。(作宾语)Is this the farm (which/that) you visited last week?这是你们上周参观过的那个农场吗？(作宾语)The park which/that attracts the most visitors will be closed.吸引最多参观者的那个公园将要关闭了。(作主语)The reason (which/that) he explained at the meeting was not sound.他在会议上解释的原因并不充分。(作宾语)UNIT 5LANGUAGES AROUND THE WORLD英语必修第一册(配人教版) 1“介词关系代词”结构中的关系代词通常用whose, which或whom，不用that。This is the pencil with which I draw pictures.这是我画画用的那支铅笔。2“介词关系代词”结构中介词的确定方法。关系代词前介词选择三原则： 一先，二动，三意义。(1)一先，即根据介词与先行词的搭配关系选择。We will never forget the day on which the earthquake happened in Wenchuan.我们将永远不会忘记汶川发生地震的日子。二、“介词关系代词”的用法UNIT 5LANGUAGES AROUND THE WORLD英语必修第一册(配人教版) (2)二动，即根据定语从句中谓语动词与介词的搭配关系选择。He is the model from whom we should learn.他是我们应该学习的榜样。(3)三意义，即根据定语从句的意义来确定介词。Look at the building over which is flying a red flag.Its where I work.看那栋上面飘着红旗的房子，这就是我上班的地方。3“介词关系代词”前可有名词、数词或some, any, none, both, all, neither, most, each, one, few等代词，构成“名词/代词/数词等介词关系代词”结构。Here are the questions, some of which I thought difficult for you.就是这些问题，其中一些我认为对你来说太难。UNIT 5LANGUAGES AROUND THE WORLD英语必修第一册(配人教版) 1I still remember the days when we studied in middle school.( )2I still remember the days which we spent on the island in our holidays.( )3The factory where my father works is very big.( )4The factory which is near my home is very big.( )5The factory which we visited is very big.( )6The factory whose name is HD is very big.( ).画出下列各句中定语从句的关系词，并指出其功能状语 宾语 状语 主语 宾语 定语 UNIT 5LANGUAGES AROUND THE WORLD英语必修第一册(配人教版) 1Air，_ which man cant live, is really important.2The witness _ whom the policemen referred was killed.3I dont know the reason _ which he was late for school.用适当的介词填空withouttoforUNIT 5LANGUAGES AROUND THE WORLD英语必修第一册(配人教版) 1Trading leather shoes is the business _ (格林一家所致力于的)(devote)2He had a lot of friends，_ (没有人会提供帮助) to him when he was in trouble.(offer)3There are two buildings there，_ (较大的那栋大约有) a hundred feet tall.(stand).用“介词关系代词”完成下列句子to which the Greens are devotednone of whom would offer helpthe larger of which stands nearlyUNIT 5LANGUAGES AROUND THE WORLD英语必修第一册(配人教版) 课时跟踪检测课时跟踪检测(二十三二十三)谢谢观看！谢谢观看！