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he is playing cards with his friend改否定句

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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!
再问: i’m playing with the baby 。playing with the baby 对它提问
再答: What are you doing ?