当先行词指人时,若它在从句中作主语,则用who;若它在从句作宾语,则用whom或who;若它在从句中作定语,则用whose。如:
The man who told me this refused to tell me his name. 告诉我这事的人不肯告诉我他的名字。
The woman whose umbrella you took is very angry about it. 你拿了那个女人的伞,她非常生气。
当先行词指物时,若在定语从句中作主语或宾语,则用which;若它在定语从句中作定语用,则用of which或whose。如:
I saw something in the paper which might interest you. 我在报上看到一样可能使你感兴趣的东西。
He’s written a book the name of which (whose name) I’ve forgotten. 他写了一本书,书名我给忘了。
关系副词主要有when, where, why等,在定语从句中作状语,分别表示时间、在点和原因。when主要放在time, day, years, season, age, occasion等时间的名词后;where主要放在place, city, town, village, house等地点名词后;why则通常只放在reason后。如(www.yygrammar.com):
Wednesday is the day when the shops are not open in the afternoon. 星期三下午商店不开门。
Give me one reason why we should help you. 给我举出一个我们应当帮助你的理由。
要特别注意,activity, case, point, even, situation, job, organization, position等抽象名词后接where引导定语从句的用法(这是近几年高考的一个新热点)。如:
I don’t want a job where I’m chained to a desk all day. 我不想找一份整天坐办公桌前的工作。
Today, we’ll discuss a number of cases where beginners of English fail to use the language properly. 今天,我们将讨论一些英语初学者对英语使用不当的问题。
The treatment will continue until the patient reaches the point where he can walk correctly and safely. 治疗将会持续到病人可以正常且安全地行走。
If you risk something important, you cause it to be in a dangerous situation where you might lose it. 你如果拿重要的东西去冒险,那你就是将它置于一种可能会失去它的危险境地。