形容词性物主代词 顾名思义是 形容词的性质,用来修饰名词,如 my teacher,their teacher.
而名词性物主代词 顾名思义 是名词的性质,本身拿来当名词用,mine
相当于形容词,在句中只可作定语,修饰名词.如：Their teacher is Miss Gao.
（1）形容词性物主代词相当于形容词,在句中只可作定语,修饰名词.如：Their teacher is Miss Gao.
（2）名词性物主代词相当于一个名词短语,在句中可作主语、宾语等成分.如：
This is your bike,mine is under the tree.（作主语）
这是你的自行车,我的在树下.
I like my pen,I don’t like hers（作宾语）
我喜欢我的钢笔,我不喜欢她的.
That bag isn’t mine,it's yours.(作表语)
那个书包不是我的,是你的.
（3）名词性物主代词作主语时,谓语动词的单、复数形式取决于它所替代的名词的数.如：
My trousers are long,hers are short.我的裤子长,她的裤子短.
Your school is big,ours is small.你们的学校大,我们的学校小.
（4）形容词性物主代词不可单独使用,其后必须有被修饰的名词.如：
那是他的椅子,我的在那儿.
误 That's his chair,my is over there.
正That's his chair,mine is over there.
正That's his chair,my chair is over there.
Whose用法
whose不等于who's.Whose是who的所有格形式,意为“谁的”,而who's是who is的缩略形式,意为“谁是”.但whose与who's同音,都读作[hu:z].
whose在句中可作表语、定语等.如：
Whose is that computer?那台电脑是谁的?（作表语）
Whose sweaters are these?这些是谁的毛衣?（作定语）
whose用来对物主代词及名词所有格进行提问：
1．提问形容词性的物主代词.如：
These are my bananas.→Whose bananas are these?
2．提问名词性的物主代词.如：
That bedroom is mine.→Whose is that bedroom?
Hers are in the classroom.→ Whose are in the classroom?
3．提问名词所有格（不包括of构成的所有格）.如：
Those are the twins’ bags.→ Whose bags are those?
Tom's mother is a good teacher.→ Whose mother is a good teacher
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