A: We're going to have to postpone the meeting.
    甲：我們必須將會議延后舉行。
    B: Why?
    乙：為什么呢？
    A: Mr. Chen can't make it today.
    甲：陳先生今天趕不來。
    類似用語
    How come?為什么？
    百寶箱
    注意“Why?"與“How come?"均表示“為什么？”，但在完整的問句中卻有所差異。Why之后必須接倒裝句型；而How come之后則接不倒裝句型，即“How come+主語+動詞？”。
    Why is Mary crying?
    = How come Mary is crying?
    = Why is it that Mary is crying?
    = How is it that Mary is crying?
    （瑪麗為什么在哭呢？）