发布网友 发布时间:2023-10-28 05:32
共1个回答
热心网友 时间:2024-12-05 01:19
1过去进行时:表示在过去某一时刻或某一段时间内进行或发生的动作。其形式为was /were + V-ing。 例句: We were watching TV from seven to nine last night. 昨天晚上七点到九点的时候我们在看电视。追答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
现在完成时
7.(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 Qing 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.
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。
You can go home when you have finished 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
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
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
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。
(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。
(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。
(8) 过去将来时的被动语态:would be+过去分词