英语常用时态的公式,及这些时态的被动语态的公式答:在以if, when, as long as, as soon as, after, before, in case, until, unless等连词以及具有连词作用的副词(immediately, the moment, directly)等引导的状语从句,一般用现在时代替将来时。强调延续性或动态时,可用完成时。 例:I hope his health will have improved by the time you come back next ...