问题描述：
I am a middle school student.变为否定句.
变为否定句
I can piay soccer ball.
They come from America.
He has a litter brother.
Lily's mother is Peter's aunt.
变为否定句
I can piay soccer ball.
They come from America.
He has a litter brother.
Lily's mother is Peter's aunt.
问题解答：
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