为什么要用does?When does the train leave the station?

为什么要用does?When does the train leave the station? She does the housework.为什么要用does,不用别的? What I said does not matter.为什么要用does how much is does this belt?为什么要用does what time does the museum coles 为什么要用does when does she ofen does what does it mean?为什么用does 什么时候用when does when is /are when does the school beginwhen (does) the school begin可不可以 when (will) the school begin.开学不是将来才开吗？为什么可以用does . when does your new semester start?这句话为什么要用助动词does?如果把助动词去掉这句话还对么?为什么 when does the chass my sister does not have tobuy any vegetable today 这句话中的does为什么要用does而不用do Does的用法,为什么our前面也可以用does?例如这句话,用does怎么说,我们的教育体系要改革吗?用DOES, he does not interrupt the people when they are talking.这个句子中为什么要用talk,不用speak? 为什么要填does?英语 —＿＿the magazine come out?—Once a month .And it aways sells well.( )A.How often does B.How often is C.When does D.When is为什么要选A,不是要用被动语态吗, Where does the rain come from?这句话中,为什么要用does? what does your brother always in the evening 为什么要用does?