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1. There is a big house.（变为否定句）5Y+Q4G2|3j2w2t,N6m*G;X3]
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2. He studied very hard.（变为一般疑问句）5Y+Q4G2|3j2w2t,N6m*G;X3]
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3. Did your grandma learn English? （作否定回答）5Y+Q4G2|3j2w2t,N6m*G;X3]
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4. He swims every day.（改为正在进行时态）5Y+Q4G2|3j2w2t,N6m*G;X3]
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5. They can cook vegetables.（用should改句子）5Y+Q4G2|3j2w2t,N6m*G;X3]
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