造一句以There is 开头的句子,并把它改成一般疑问句,做肯定否定回答,再改成否定句.

there is a small dog hide in the grass.
Is there a small dog hide in the grass? 一般疑问句
yes ,there is/no,there isn't 肯定／否定
there isn't a small dog hide in the grass 否定句

There is an apple on the table.
疑问句：Is there an apple on the table ?
否定句：There isn't an apple on the table.

造句：There is a book on the desk.
一般：Is there a book on the desk?
肯定/否定：Yes,there is./No,there isn't.
否定句：There isn't a book on the desk.

There is a dog.
Is there a dog?
Yes,there is.
No,there isn't.