题目内容：

The baseball is under the chair转换成否定形式,并提问,作回答
我是写了The baseball don't is under the chalr.
Do the baseball is under the chalr?
Yes,it do./No,it don't.错了

优质解答

The baseball isn't under the chair.
Is the baseball under the chair?
Yes,it is.
No,it isn't.