题目内容：

pep小学英语语法2
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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优质解答

1.Are they doing housework?
They are not doing housework.
2.Are the students cleaningthe classroom?
yes,they are.No,they aren't
3.what are you playing(doing) in the playground?(不知道你划线的内容是什么）
4.What is Tom doing in his study?（这句也是.）