adv. (用于问句)为什么;为何;(反问,表示不必)何必;(说明理由)为什么;
int. 呵唷,哎呀,嗨;
n. 理由;原因;说明;难解的问题;
例句:
Why wear such a woebegone look?
为什么一副愁眉苦脸的样子?
Why bother like this?
何苦乃尔?
She wondered why they hadn't given her an answer.
她纳闷儿为什么他们没给她回信.