9.当先行词又有人又有物时。

e.g. I won't forget the things and the persons that I saw.

◆ 只能使用which的情况。

1、非限制性定语从句中。

e.g. Mary has a book, which is very precious.

2、在介词之后。

e.g. This is a house in which lives an old man.

3、当主句中的主语被that修饰时。

e.g. That dog which I found in the street belongs to Mary.

Fill in the blanks with suitable relative pronouns.

1. This is the only book _ ___ I got last year.

2. Is this the book in _ __ you are interested?

3. This is the largest animal _ _ Tom saw in the zoo.

4. Rose still remembers the trees and teachers_ __ exist (存在)in the mother school.

5. All the desks _ ___ are bought look really wonderful.

6. Do you have any money _ __is used to build the factory?

7. Tom has a toy, ______was given by his father.

8. This is the second watch __ __ my father bought for me.

Ⅱ 修饰人时关系代词that 和who, whom的区分。

1．当主句中的主语是who时，只能用that。

e.g. Who is the girl that is standing over there?

2. 在非限制性定语从句中以及介词后面时只能用who 或者whom。

e.g. I have a son, who is really lovely and interesting.

　There are 40 students in the class, most of whom are boys.

3. 关系代词whose既能修饰人，也能修饰物，在定语从句中充当定语，修饰先行词。

e.g. She is the girl whose English sounds very beautiful.

Mary has a very good dog, whose hair turns out white and black.

◆ Correct mistakes for the following sentences.

1. Under the big tree are 34 students, many of them come from class two.

2. My mother has a good book, which cover looks terrible.

3. Who are the young girls who are having dinner in the restaurant?

4. She is one of the girls who is very interested in maths.

5. Tom is the only one of the boys who like playing football.

6. Who is the girl that you talked to her just now?

7. This is the very pen that you gave it to me before.

8. There is an old woman, that is holding a stick.

Ⅲ 定语从句的省略

1.that做定从中主语，不可省。

There is a girl that(who) has green hair..

2 that做定从中宾语，可省，也可不省。

There is a book (that) you have not read.

3 有that be/which be引导的定从，能省就省。

There is a book (that was) borrowed by Mary yesterday.