1、
【肯】There is a book on the desk.
【否】There isn't a book on the desk.
【疑】Is there a book on the desk?
【答】Yes,there is./No,there isn't.
2、
There is a tree in the garden.
There isn't a tree in the garden.
Is there a tree in the garden?
Yes,there is./No,there isn't.
3、
There are five people in my family.
There aren't five people in my family.
Are there five people in my family?
Yes,there are./No,there aren't.
4、
There are some flowers on the desk.
There aren't some flowers on the desk.
Are there any flowers on the desk?
Yes,there are./No,there aren't.
5、
There is one bed and two chairs in the room.
There isn't one bed and two chairs in the room.
Is there one bed and two chairs in the room?
Yes,there is./No,there isn't.
6、
There are four pens and one eraser in my schoolbag.
There aren't four pens and one eraser in my schoolbag.
Are there four pens and one eraser in my schoolbag?
Yes,there are./No,there aren't.