句型转换:
1. They are doing housework .(分别改成一般疑问句和否定句)
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2.The students are cleaning the classroom . ( 改一般疑问句并作肯定和否定回答)
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3.I’m playing the football in the playground .(对划线部分进行提问)
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4.Tom is reading books in his study . (对划线部分进行提问)
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3和4题画线部分不知道了,我在学习现在进行时,请画线再回答。