he is playing cards with his friend改否定句

he isn't playing cards with his friend.
陈述句变否定句的方法：
句中有动词be( am ,
is ,are ,was ,were),情态动词（can / could ,may ,must ,will ,would 等）,助动词（如完成时态中的HAS / HAD ）,变否定句时直接在这些词后加NOT ；否则要加助动词Do ,
Does （主语第三人称单数）,
Did （一般过去时）,原来的动词要还原；另外,句中有SOME 是一般改为ANY ,如果用AND 要改为OR（因为否定句中的并列要用OR）
加油!不明白再问!i’mplaying withthe baby 。playing withthe baby 对它提问What are you doing ?