请英语高手介绍如何如何区分各种从句的引导词?

请英语高手介绍如何如何区分各种从句的引导词?

限制性定语从句的常见引导词 1.以关系代词who,whom,whose,which,that,as引导.如：Here is a letter from Mr.Li who wants a job in Xi'an.这里有李先生的来信,他想在西安找份工作.2.以关系副词where,when,why,how引导.如：This is the house where I once lived two years ago.这是我两年前曾住过的房子.二、 非限制性定语从句的常见引导词 1.以关系代词which,as引导.如：Father came back on May 12,which was my birthday.父亲是五月十二日回来的,这一天是我的生日._______ is known to everybody,the moon travels round the earth once every month.大家都知道,月球每月绕地球转一圈.(NMET 2001,34 ) A.It B.As C.That D.What (答案：B ) as和which都可用来引导非限制性定语从句,有时可以互换.如：He failed in the experiment,as (which) was natural.很自然,他在实验中失败了.但他们还是有区别的,as作为关系代词引导限制性定语从句：①一般用于such n.as或the same n.as或(as)...as结构;as在定语从句中可作主语、宾语和表语.如：Such a book as you described should not be published at all.像你描述的那样的书不应该出版.This is the same watch as I bought last week.这块手表和我上周买的那块相似.②as作为关系代词引导非限制性定语从句,在从句中作主语或宾语,用来说明整个主句的意思,从句的位置可放在主句之前也可放在主句之后,还可夹在主句之间.如：As is known to all,the earth travels round the sun.大家都知道地球围绕太阳转.This elephant,as anybody can see,is like a snake.任何人都能看出这头大象像蛇.③关系代词which也可指代整个主句,但是引导的非限制性定语从句只能放在主句后面.如：He made great progress this term and won the first prize in the exam,which made us surprised.他这学期取得了很大进步,并且在这次考试中获得一等奖,这使我们吃惊.④当定语从句位于主句之后时,如关系代词作主语,而且定语从句用的是主谓结构或主谓宾加宾补结构,此时多用which.如：He cheated in the exam,which made his teacher very angry.他在考试中作弊,这使他的老师很生气.2.名词(代词) of which (whom) 引导.如：这种结构在定语从句中作定语,相似于“whose 名词”.She lives in the room ,the door of which (whose door) faces south.她住在那个窗户朝南的房间里.3.不定代词、数词或形容词最高级 of which (whom)引导.这种结构通常在从句中作主语,表示整体中的一部分.其中常用的不定代词有：all,none,both,neither,some,any,most等；数词既可用基数词和序数词,也可用分数和百分数词.如：There are 20 girl students here,none of whom likes physics.这里有20个女学生,他们当中没有人喜欢物理.He lent me some books,four of which were very interesting.他借给我一些书,其中四本非常有趣.