happen ['h?p?n]
vi.
1. 引起，发生:例句: Accidents will happen.
很有可能会发生意外。to happen what may
无论发生什么情况2. 降临(到某人身上)(常与to连用):例句: Please give it to my wife if anything should happen to me.
万一我遇到不幸，请把这个交给我妻子。3. 碰巧；恰好:例句: Do you happen to remember his car number?
你还记得他的车牌号码吗?It so happens that I'm free today.
真是巧极了，正好我今天有空。4. 偶然遇见；偶然发现(常与on或upon连用):例句: He happened on a clue to the mystery.
他偶然发现了那秘密的线索。5. [主美国英语]偶然出现；碰巧来(或去):例句: My friends happened along at that time.
那时我的几个朋友碰巧来了。I bought today's newspaper for you as I happened past the post office.
我刚巧路过邮局，就给你买了今天的报纸。6. [俚语]极其兴奋，非常有趣adv.[方言]偶然，碰巧
近义词:
chance . occur . transpire .
短语
1. as it happens碰巧；偶然2. happen in with偶然遇到3. happen what may (或will)不管怎样，不管发生什么情况4. It (so) happens that碰巧，恰巧
以上来源于: 《21世纪大英汉词典》