1、Discovering Useful Structures Review:What is the attributive clause？eg.She is the one who you never forget.定语从句结构：从句关系词修饰名词或代词的句子先行词关系词被修饰的名词或代词 引导定语从句 替代先行词 充当句子成分关系代词关系副词who whom that which whose when where why 定义：关系代词与关系副词的选用关系代词与关系副词的选用如何确定关系词（分析从句的成分）Eg:This is the factory _ he used to work.Thi
2、s is the factory _ I visited last year.一找从句二划先行词三定关系词 作主/宾/定语 关系代词作状语 关系副词wherewhichwhen的的用法用法 when表示时间，代替先行词并在定语从句中做时间状语，其先行词往往是表示时间的名词，如time,day,year,month,week,moment,occasion，age，period,stage等。Eg:Ill never forget the day when I joined the team.Test:Ill never forget the day _ I lived in the mount
3、ains.Ill never forget the day _ I spent in the mountains.whenwhichEg:The school where my son studies is near a park.They have reached the point where they have to separate with each other.Test:This is the house _ he was born.This is the house _ was set up by his parents.where表示地点，代替先行词并在定语从句中做地点状语，其
4、先行词往往是具体地点place,room,mountain,airport或抽象地点的名词如case,state,condition,point,situation等。where的的用法用法wherewhichEg:Do you know the reason why he is so upset?Test:This is the reason _ he was late.This is the reason _ he told us for his being late.why表示原因，代替先行词并在定语从句中做原因状语，其先行词是表示理由的名词reason。why的的用法用法whywhic
5、h1.when可以换成“介词which”。I still remember the day.I came to Beijing on that day.I still remember the day when(_)I came to Beijing.2.where可以换成“介词which”。This is the hotel.They stayed in the hotel.This is the hotel where(_)they stayed.这就是他们待过的旅馆。3.why可以用“for which”来代替。This is the reason.He left in a hurry
6、for this reason.This is the reason why(_)he left in a hurry.这是他匆匆离开的原因。关系副词when,where,why引导定语从句时，关系副词也可用“介词+关系代词”代替。on whichin whichfor which介词介词+关系代词引导的定语从句关系代词引导的定语从句1.关系代词的确定当关系代词在定语从句中作介词的宾语时,我们通常用“介词+关系代词”引导定语从句。先行词指物时，关系代词只能用which；先行词指人时,用whom。Eg:The man to _ you spoke is a teacher.The city in
7、 _ she lives is far away.whomwhich限制性定语从句和非限制性定语从句限制性定语从句和非限制性定语从句 限制性定语从句：对先行词起到修饰作用 Eg:This is the teacher who has taught for 30 years.非限制性定语从句：对先行词起到补充说明的作用，有逗号隔开有逗号隔开。Eg:Mr.Smith,who came to see me yesterday,is one of my best friends.限制性定语从句和非限制性定语从句限制性定语从句和非限制性定语从句 位置不同：which通常放在句末，而as可放在句首，句中或
8、句末。Eg:As is known to all,China is a developing country.Mark Twain,as we know,is a famous American writer.He doesnt like the job,as you can see.The roads were flooded,which made our journey more difficult.翻译不同：which可翻译为“这，那”；as翻译成“正如”Eg:Our team won the match,as we expected.He broke his promise,which made me angry.as固定词组搭配 as we all know=as is known to allas is often the case as is said/reported/expectedas often happens非限制性定语从句中，as和which的用法区别感谢聆听感谢聆听单击此处添加副标题
