we're writing letters to our grandma.改否定句怎么改?

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we''rewritingletterstoourgrandma.改否定句怎么改?we''rewritingletterstoourgrandma.改否定句怎么改?we''rewritingletterst

we're writing letters to our grandma.改否定句怎么改?
we're writing letters to our grandma.改否定句怎么改?

we're writing letters to our grandma.改否定句怎么改?
we aren't writing