howcome和why的區(qū)別：含義不同、用法不同、強調(diào)重點不同。howcome的含義為“為什么”、“怎么會”，常用于口語中，不在書面語中出現(xiàn)；why可作副詞、名詞和感嘆詞，含義為“為何、何必、哎呀、理由、說明”，可用于口語，也可用于書面語。
一、how come的含義及用法
how come意為為什么；怎么會…（那樣）。例句有：
1、How come he hasn't been able to be as good this year?
為什么他今年表現(xiàn)不及往常呢？
2、How come you look so thin these days?
你最近瘦了，怎么鬧的？
3、How come you, one of the family, are speaking like a stranger?
一家人怎么說起遠話來了？
4、How did he come to break his leg?
他怎么把腿弄斷的？
5、How did you come by that cheque?
你是怎么弄到那張支票的？
6、How will that come off, do you think?
那件事的結(jié)果將會如何，您想過沒有？
二、why的含義及用法
why可作副詞、感嘆詞和名詞，意為為什么？;(用于問句)為什么，為何;(反問，表示不必)何必;(說明理由)為什么，…的原因；哎呀，呦，喲，嗨；原因;理由;說明;難解的問題。例句有：
1、Why were you late?
你為什么遲到？
2、Why get upset just because you got one bad grade?
何必因為一次成績不好就想不開呢？
3、I know you did it─I just want to know why.
我知道這是你干的，我只是想知道為什么。
4、Why, it's easy─a child could do it!
嗨，這容易得很，連小孩子都干得了！
5、Why don't you look where you're going?...
走路怎么不看著點兒道呢？
6、There's a reason why women don't read this stuff; it's not funny...
女人不讀這種東西是有原因的，它并不好笑。
