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