按要求完成句子。
1.I could swim before. (改为否定句)
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2.Now, I don’t like red. (将now改为before)
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3.I thought it was too cold in winter before. (将before改为now)
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4.I know it from the new film. (对画线部分提问)
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5.I could see many stars at night. (改为一般疑问句)
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