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(2) where I lived ten years ago has been pulled down.

3. why指原因，在定语从句中做原因状语

(1) Please tell me .

(2) I don’t know .

注意：关系副词引导的从句可以由“介词+关系代词”引导的从句替换

(1) is not clear,

(2)From he began to know him.

(3)Great changes have taken place in .

二、介词+关系代词引导的定语从句

关系代词在定语从句中做介词宾语时，从句常由介词+关系代词引导

(1)The school =The school in which he once studied is very famous.

(2)Tomorrow I will bring here a magazine (that/which) you asked for.

=Tomorrow I will bring here a magazine .

(3)We’ll go to hear the famous singer

=We’ll go to hear the famous singer .

注意：1、有些动词短语一般不拆开使用，如：look for, look after, take care of等

(1)This is the watch . （True)

(2)This is the watch . (False)

2. 若介词放在关系代词前，关系代词指人时用whom，不可用who或者that；指物时用which，不能用

that；关系代词是所有格时用whose

(1) The man is my friend. (T)

(2) The man is my friend. (F)

(3) The plane is very comfortable. (T)

is very comfortable. (F)

3、“介词+关系代词”前可有some, any, none, both, all, neither, most, each, few等代词或者数词

(1) He loved his parents deeply, both of whom are very kind to him.

(2) In the basket there are quite many apples, some of which have gone bad.

(3) There are forty students in our class in all, most of whom are from big cities.

针 对 性 练 习

简单归纳：介词﹢关系代词引导的定语从句, 关键是判断介词的选择, 方法一是看从句谓语部分缺少什么介词(习惯搭配), 再则可以通过整个句子整体含义来判断, 结合生活实际来判断.

( ) 1.Do you know who lives in the building ______there is a well?