第1个回答 2008-09-21
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
第2个回答 2008-09-21
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.
第3个回答 2008-09-21
There is a dog.
Is there a dog?
Yes,there is.
No,there isn't.