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简介：
一、把下列陈述句改为否定句。
1. We go to school on Sunday.
We don’t go to school on Sunday.
2. We’ll go to the park this afternoon.
We won’t go to the park this afternoon.
3. I am watching TV now.
I am not watching TV now.
4. The baby can speak.
The baby can’t speak.
5. The dog runs fast.
The dog doesn’t run fast.
二、把下列否定句改为肯定句。
1. I can’t dance or sing.
I can dance and sing.
2. Her mother isn’t at home.
Her mother is at home.
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