1.[he is]2.[running]3.[in the playgound].he can ski [改为否定.一般

问题提问的不清楚,我只能根据我的理解来解答啦,
第一句是 He is running in the playground.
否定句 He isn't running in the playground.
一般疑问句 Is he running in the playground?
对in the playground提问：Where is he running?
第二句He can ski.
否：He can't ski.
一般：Can he ski?
对ski 提问：What can he do