我正在看一场篮球比赛
1.陈述句：I'm watching a basketball match.
2.否定句：I'm isn't watching a basketball match.
3.疑问句：Are you watching a basketball match?
特殊疑问句?怎么造?现在进行时的句子就只能把BE动词提到句首就变为疑问句了