The basketball is under the bed.改为一般疑问句

Is the basketball under the bed?
附录：
一般疑问句：有实义动词时,在句首加助动词.He goes to school by bus.Doe he go to school by bus?
有系动词或情态动词时,直接把系动词或情态动词提前.He is a boy.Is he a boy?
特殊疑问句,以疑问词开头,对句中某一成分提问的句子叫特殊疑问句.常用的疑问词有：what who whose which when where how why等.
例如,
What are you doing now?
Who is he?等等