英语，把下列句子变成一般疑问句和否定句

are the hoys and the girls in the same grade?
The hoys and the girls are not in the same grade

Is his coat too long?
His coat is not too long

Is that a cap?
That is not a cap

Are those blue buses old?
Those blue buses are not old

1.Are the boys and girls in the same grade?
The hoys and the girls aren't in the same grade
2.Is his coat too long?
His coat isn't too long.
3.Is that a cap?
That is not a cap.
4.Are those blue buses old?
Those blue buses are not old.

1. 疑问：Are the boys and girls in the same grade?
否定：The boys and girls are not in the same grade.
2. 疑问：Is his coat too long?
否定：His coat is not too long.
3. 疑问：Is that a cap?
否定：That is not a cap.
4. 疑问：Are those blue buses old？
否定：Those blue buses are not old.

1,疑问：Are he hoys and the girls in the same grade?
否定：The hoys and the girls are not in the same grade