指示代词：
this 这个that 那个these 这些those 那些肯定句，否定句：
This is Mr Smith, and that is Ms Green. This is(not) my elder brother Tony.
That is(not) my younger sister Jones.
This is(not) my first time to come to China. That is to say,he is a wise man.
These are(not) my parents.
Those are(not) his children.
This is my football.
This football is mine.
That is your basketball.
That basketball is yours.
These are his apples.
These apples are his.
Those are their books.
Those books are theirs.
一般疑问句：
---Is this a football?
---Yes,it is.
---Is that a basketball?
---No,it isn`t.
---Are these apple trees?
---Yes,they are.
---Are those books yours?
---No,they aren`t. Is this your football?
Is this football yours?
Is that his basketball?
Is that basketball his?
Are these her apples?
Are these apples hers? Are those their books? Are those books theirs?
特殊疑问句：
---What`s this(in English)? ---It`s a dictionary.
---What`s that?
---It`s a bike.
---What are these?
---They are their coats.
---What are those?
---They are cars.
---Whose sweater is this? Whose is this sweater? ---It`s Mr Hu`s.。