what 、、、for =why what 、、、for提问时怎么回答

what for = why 造句 what for =why吗? what 、、、for =why what 、、、for提问时怎么回答 在定语从句中Why为什么等于why=for which 不是Why＝for what What is the main them of American literature?What was Poe famous for?Wha全是美国文学方面的. Routers and switchesI just design a network in city council for coursework.please give me a suggest that which router and switches are better.by the way,we got low budget.I‘m not ask what is router.I just want know,such as,what we are using,why,wha what for和why的区别 English.what …for等于why吗? You leave a message for your supervisor.What would you say?Call me!I would like to discuss the new figures.I am available all day at extension 123.Why not return my call when you get back from your 3 hour lunch break?A client comes to your office.Wha what for,why not,what's up和so 请问for what =why 有什么区别,分别在什么情况用 ( ) was Betty late for school yesterday?A.Why B.What C.What reason D.What for what for 的答语用什么?because...还是for...what for 不是等于 why ---------------you join us for lunch?A what about B what if C why D why not 1.如何询问时间：---What’s the time?= _______________? ---It’s six o’clock. 2.询问日期-----Wha ( ).____do you usually use your computer___?( ).____do you usually use your computer___?A.What;for B.Why;/ C.Why;for D.Both A and BWhat.for=Why ,那么选D么?怎么觉得有点怪怪的额、、、嗯? what is the best time time for exercising?why? That is what i am here for为什么不用why