精选优质文档-倾情为你奉上各种时态的主动、被动语态结构表（以动词do为例）时态用法时间状语动词构成例句主动语态被动语态主动语态被动语态一般现在时1)经常性、习惯性的动作或存在的状态。2)主语的特征、性格、能力、爱好等。3)表示客观真理often, sometimes, always, usuallyeveryday/; on Mondays once a week , twice a yeardo/doesam/is/are +doneWe clean the classroom.The classroom is cleaned by us.一般过去时表示在过去某个时间发生的动作或存在的状态，也表示过去经常或反复发生的动作。yesterday; last week/; in 1990ten minutes ago just nowdidwas/were +doneHe bought me some books.I was bough
