1．在大多数名词末加“'s”

the boy's toy, men's work

2．以 s结尾的复数名词直接加“'”

the students' reading room

3．以 s结尾的单数名词加“'”

Dickens' novels    the actress' performance

4．合成名词在最后一个词上加“s”

her brother-in-law's piano.

Somebody else's books. （重要！）

【金牌重点】除用于有生命的人外，“'s”格还可用于度量衡、地域、天体及一些习语中：

an hour's drive,    a mile's journey

ten pounds' weight,    Beijing's weather

the earth's surface

a stone's throw 投石之距离

at one's wits end 智穷计尽

to one's heart's content 尽情地

by a hair's breadth 千钧一发

at a snail's pace 缓慢地

5．双重所有格：

如果被修饰的名词前有不定冠词、不定代词、指示代词、疑问代词修饰。则要采用双重所有格。

a friend of mine  （名词性物主代词）

a child of hers

the love poems of your sister's

注意区别：

● a portrait of her mother 她母亲的画像（画中人）

● a portrait of her mother's 她母亲拥有的画像中的一幅（不一定是她母亲的画像）

测试精编

1. Julie went to the ________ to buy a pair of shoes.

A. shoes store     B. shoe's store     C. shoe store     D. shoes' store

2. As a safety precaution, all city cab drivers carry only enough money to make change for a ________ bill.

A. ten-dollar                        B. ten-dollars

C. tens-dollar                       D. ten-dollar's

3. Recently, he has lost all his ________ at cards.

A. wage and saving                  B. wages and saving

C. wage and savings                 D. wages and savings

4. I want ________ .

A. a dollar worth candy               B. candy a dollar's worth

C. a dollar's worth of candy            D. a dollar worth's candy

5.The surroundings a child grows up in usually ________ an effect on his development.

A. have       B. had       C. do       D. has

（后设答案，大家不要偷看哦~(*^__^*) 嘻嘻……）

KEYS

1. C    2.A     3.D     4. C    5.A