英语完成时、主动语态变被动语态
我给你从百度上粘过来的：肯定句：主语 have/has 过去分词否定句：主语 have/has not 过去分词疑问句：Have/Has 主语 过去分词7。 现在完成时(1) 现在完成时的句型结构①肯定句：主语 have/has 过去分词②否定句：主语 have/has not 过去分词③疑问句：Have/Has 主语 过去分词(2) 现在完成时的用法①表示到目前为止曾经有过的或未曾有过的经历和体验。 常和never, ever, several times等连用。如：I’ve never been to Africa。 Have you ever been to Tokyo...全部
我给你从百度上粘过来的：肯定句：主语 have/has 过去分词否定句：主语 have/has not 过去分词疑问句：Have/Has 主语 过去分词7。 现在完成时(1) 现在完成时的句型结构①肯定句：主语 have/has 过去分词②否定句：主语 have/has not 过去分词③疑问句：Have/Has 主语 过去分词(2) 现在完成时的用法①表示到目前为止曾经有过的或未曾有过的经历和体验。
常和never, ever, several times等连用。如：I’ve never been to Africa。 Have you ever been to Tokyo?I’ve been there three times。
②。 表示某动作从过去开始，现在刚刚完成，对现在有一定的影响。常与just, already, yet, so far等词语连用。 如：He has just finished his new book。
注意：just now用于过去时。③。表示某动作从过去开始，一直持续到现在，可能还会持续下去。通常与 for或since连用。如：I have lived in Qingdao for 6 years。
/since 6 years ago/since 2003/ since I came to this city。It is/has been … since…。It’s been seven years since we last saw each other。
It’s six years since he was a teacher。 注意:for 一段时间，since后接一个过去的时间点或一般过去时的句子。④ 在表将来的时间状语和条件状语从句中代替将来完成时。
如：You can go home when you have finished your work。 比较：You can go home when you finish your work。
主动语态变被动语态：(1) 一般现在时的被动语态：am [is, are] 过去分词English is taught in our school。 我们学校学英语。We are taken good care of at school。
我们在学校受到很好的照顾。(2) 一般过去时的被动语态：was [were] 过去分词He was taken to the police station。 他被带到了警察局。The house was built ten years ago。
这座房子是10年前建的。(3) 一般将来时的被动语态：will be 过去分词A new building will be built here soon。 不久这里将建一栋新楼。The meeting will be held at two this afternoon。
会议将于今天下午2点举行。(4) 现在完成时的被动语态：have [has]been 过去分词All the work has been done now。 所有的工作现在都做好了。Have the letters been posted? 信都寄了吗？(5) 过去完成时的被动语态：had been 过去分词He said the work had been finished。
他说工作已完成了。(6) 现在进行时的被动语态：am [is, are] being 过去分词My watch is being repaired by him。 我的表正在由他修理。The plan is now being discussed。
计划现在正在讨论。(7) 过去进行时的被动语态：was [were] being 过去分词He said that the man was being operated on。 他说那个人正在动手术。
He told me that a new station was being built。 他说正在修建一个新车站。(8) 过去将来时的被动语态：would be 过去分词He said that the meeting would be held next week。
他说会议将于下周举于。收起
