. . why

1.（用于问句）为什么，为何used in questions to ask the reason for or purpose of sth

2.（反问，表示不必）何必used in questions to suggest that it is not necessary to do sth

3.（说明理由）为什么，…的原因used to give or talk about a reason

why ever

（用于问句，语带惊讶）究竟为什么used in questions to mean ‘why’, expressing surprise

why not?

（提出或赞同建议）为什么不呢，好哇used to make or agree to a suggestion

1.（惊讶、不耐烦等时说）哎呀，呦，哟，嗨used to express surprise, lack of patience, etc.

the whys and (the) wherefores

理由；原因；缘故the reasons for sth

1.为什么

2....的原因[理由]

1.原因,理由,(理由的)说明

2.难解的问题

1.哎呀

1.used for asking the reason for something; used when someone knows or says the reason for something

2.used at the beginning of a comment or reply for showing that you are surprised