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''what's happened to you?''the old man said to me为什么HAPPEN要加ED如果是过去式为什么要用IS，WAS是不可以缩写的吧
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''what's happened to you?''the old man said to me
为什么HAPPEN要加ED
如果是过去式为什么要用IS，WAS是不可以缩写的吧
为什么HAPPEN要加ED
如果是过去式为什么要用IS，WAS是不可以缩写的吧
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答案和解析
what has happened to you
完成时态,用has
完成时态,用has
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