英语基础语法 |
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完成时态: 1>现在完成时:站在现在看之前 形式 have/have + done .(过去分词) 用法:A:现在全部完成(过去的事对现在有影响) B:现在部分完成(从过去持续到现在的事) 比如: 同学,你作业写得怎么样?【截止到现在回头往之前看:现在的之前】 你去朋友家找同学,同学不在家,他妈妈说他出去了。【现在的之前出去了】He has left .【现在全部完成】 We have studied English for ten years .【现在部分完成:现在还在学】
2>过去完成时:过去的之前发生的事 形式 had + done .(过去分词) 用法:过去的之前 When he got there , she had left .She was not there .(当他到的时候,她已经走了,她已经不在那里了)
3>将来完成时:将来的之前 形式 will/share have + done .(过去分词) 用法:将来的之前【阶段性总结:截止到某一个时间点回头看之前完成的结果】 截止到现在,我们已经上了三次课了(现在完成时); 截止到上周,我们已经上了二次课了(过去完成时); 截止到下周,我们就学完了(将来完成时);
完成进行时态:“完成”+“进行” ; = xx时间的之前,强调进行的过程。
A.过去完成进行时:had been + doing B.现在完成进行时:have/has been+ doing C.将来完成进行时:will/shall have been+ doing
现在完成时和现在完成进行时的比较: A:角度相同,都表示现在的之前。 B:现在完成:have/has + done ; 现在完成进行时:have/has been + doing . C:强调不同:现在完成:强调结果(做完与否都可以) 现在完成进行:强调过程 We have not won the match .我们没赢得比赛。(强调结果) We have been working hard for several months .我们已经努力了好几个月了。(强调过程) They had been working one the program for almost one week before i joined them, and now we are still working on it as no good results have come out so far . 时态:谓语动词的变化 时态 过去 现在 将来 过去将来 一般 did do/does will do; am/is/are+going to do would do; was/were+going to do 进行 was/were + doing am/is/are + doing will/shall + be doing would或者was/were going to+ V 原形 完成 had + done (过去分词) have/has + done (过去分词)will/shall have + done (过去分词) 完成进行 had been + doing have/has been + doing will/shall have + been + doing
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