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.