按要求改写句子。(10分)
（1）You should clean your room. (改为否定句)
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（2）We have lunch at school.(改为一般疑问句)
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（3）I go to school on foot．(就画线部分提问)
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（4）I am not setting tables.(改为一般现在时)
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（5）Li Ming always makes a mess in the room.(就画线部分提问 )
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