2016年12月英语六级考试语法知识:虚拟语气

2016-06-27 16:04:06来源:网络

  We could have started a little earlier.

  I could have killed her. It was a narrow escape.

  2) may (might) have + 过去分词

  A. 表示对过去情况的推测,意为,“可能已做某事”。

  He may have heard the news.

  I might have come to a wrong conclusion.

  B. 表示一种未实现的可能性,即本可以做某事,而实际上并没有做,有时含有抱怨的口吻。

  It was a narrow escape. You might have killed yourself.

  A lot of men died who might have been saved.

  3) must have + 过去分词

  表示逻辑上的必然性,即按照某些现象推断过去肯定发生过的某事。

  She must have made a big mistake.

  The city at one time must have been prosperous, for it enjoyed a high level of civilization.

  4) needn’t have + 过去分词

  表示过去不必做某事,但已经做了,即本可不必做某事。

  You needn’t have woken me up. I don’t have to go to work today.

  He needn’t have watered the flowers, for it is going to rain.

  5) should / ought to have + 过去分词

  表示过去应该做某事而实际上没有做。

  You should / ought to have done what your parents told you. (But you failed to do it.)

  You should / ought to have been more careful. (But you weren’t.)

  6) shouldn’t / oughtn’t to have + 过去分词

  表示过去不应该做某事而实际上却做了。

  You shouldn’t / oughtn’t to have crossed the road when the lights were red. (But you did.)

  They shouldn’t / oughtn’t to have left so soon. (But they did.)

  7) would have + 过去分词

  表示对现在或将来某时之前业已完成的动作的推测。可译为,“可能”、“也许”、“想必”。

  He would have arrived by now.

  She would have recovered by then.

英语四级无忧计划立减1000元

-->

扫码即刻查分 四六级最新答案

四六级好课 海量资料定期更新

更多资料
更多>>
更多内容
更多>>
更多公开课>>
更多>>
更多资料