单元知识要点：
词汇：
in one’s house, the Christmas tree, you‘re welcome, get sth. from sb., very much., drink tea, at the back of the bus, get off, in front of me, point to sb., the police station, write one’s diary
句型：
Whose ... is it are they? They‘re mine his hers ours.
I’ve got two presents from Mum and Dad.
语法:
物主代词
我的
你的
他的
她的
它的
我们的
你们的
他们的
形容词性
my
your
his
her
its
our
your
their
名词性
mine
yours
his
hers
its
ours
yours
theirs
1、形容词性物主代词起形容词的作用，后面一定要跟名词。
2、名词性物主代词=形容词性物主代词+名词。例如：
This is my bag. = This is mine.
That is her ruler. = That is hers.