一般现在时there be 句型的结构

一般现在时的There be,表示现在某地有某人或某物.
Eg.1) There is a book on the desk.桌子上有一本书.
There is not a book on the desk.桌子上没有书.
Is there a book on the desk?桌子上有一本书吗?
Yes,there is./ No,there isn’t.有./没有.
2) There are some children in the classroom.教室里有一些孩子.
There are not any children in the classroom.教室里没有孩子.
Are there any children in the classroom?教室里有孩子吗?
Yes,there are./ No,there aren’t.有./没有.
注意：There be结构的be用单数或是用复数,要看离be最近的名词,它是单数就用单数is,如果它是复数就用复数are.
Eg.There is a book,a bag and three pencil-boxes on the chair.