一般疑问句:由系动词或助动词(be,am,is,are,was,were,have,has,do,does)开头,回答的方式是"是"或"否" eg:Is there anything you want?No,thanks.
特殊疑问句:由wh-疑问词(what,which,where,why,how等)开头,回答也决定于个人意愿 eg:What do you want?I want a pencil,thank you./I don't want anything.