四、被动语态：过去was/were donewas/were being done现在is/am/are doneis/am/are being done将来shall/will be doneshall/will be being done过去将来 should/would be doneshould/would be being done过去had been donehad been being done现在have/has been donehave/has been being done将来shall/will have been doneshall/will have been being done过去将来 should/would have been done should/would have been being done1、 被动语态的基本用法：(1) 强调动作的承受者时应用被动语态：The man was hit by a speeding car.那个男人被一辆快速行驶的小车撞到了。(2) 当动作的执行者不重要或不明显时用被动语态：The matter will have to be dealt with immediately.这件事需要马上被处理。(3)用it作形式主语表客观说明时用被动语态：It is said that he was killed in that accident.据说他死于那场车祸.It is thought by experts that the project will fail.专家们认为该方案将失败.It is believed that the political situation is critical.大家相信政治形势很危急.(4)有些习惯用法常用以被动语态形式出现：She was seated by the window.她坐在窗户旁。We should be devoted to what we do.我们应致力于我们所做的工作。Maricia was born in Malaysia in 1995.玛西娅1995年出生于马来西亚。2、 被动语态的变化方式：(1) 基本方式(主语宾语的位置发生了变化)：主动：He wrote this letter yesterday.他昨天写的这封信。被动：This letter was written by him yesterday.这封信是被他昨天写的。(2) 动词短语的被动语态：look at看call on号召，访问laugh at 嘲笑send for 派人去请，派人去取depend on 依靠listen to 听主动：We have sent for the doctor.我们已经派人去请医生了。被动：The doctor has been sent for.这医生已经被派人去请了。make use of利用pay attention to注意take care of照顾put to an end to结束主动：We will put an end to our quarrel.我们将结束争吵。被动：An end shall be put to our quarrel.我们的争吵将结束。完成进行时态进行时态一般时态完成时态动词 + 介词动词 + 名词 + 介词第192页carry out 实行take off 脱...
