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本帖于 2010-12-31 02:49:56 时间, 由版主 林贝卡 编辑
回答: How come 有没有过去时?全国牙防组2010-12-30 13:31:24

How come 有没有过去时?

比如说, How come he failed the exam?

>>>>>

"How come" = (informal) "why".

How come he failed the exam?

Why did he fail the exam?

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