首页 - 网校 - 万题库 - 美好明天 - 直播 - 导航
热点搜索
学员登录 | 用户名
密码
新学员
老学员
您现在的位置: 考试吧 > 考研 > 考研复习指导 > 考研英语复习指导 > 考研词汇完型 > 正文
考试吧整理“2012年考研英语语法精要:情态动词”供2012考研考生备考使用。

  七、情态动词

  注意情态动词完成式的用法有两方面的含义:

  1.表示已经发生的情况

  (1)must have +过去分词,表示对已发生情况的肯定推测,译为“(昨天)一定……”。如:

  My pain must have been apparent the moment I walked into the room, for the first man I met asked sympathetically: “Are you feeling all right?”

  (2)cant/couldn’t have +过去分词,表示对已发生情况的否定推测,译为“(昨天)一定没……”。 如:

  Mary couldn’t have received my letter; otherwise she would have replied before now.

  (3)may/might have +过去分词,表示对已发生的事情做不肯定、可能性很小的推测,或事实上根本没发生,译为“也许……”。如:

  At Florida Power’s Crystal River plant, a potentially serious leakage of radioactive water may have been unknowingly caused by an electrician.

  2.表示虚拟语气

  (1)needn’t have+过去分词,表示做了不必做的事,译为“其实没必要……”。如:

  As it turned out to be a small house party, we needn’t have dressed up so formally.

  (2)should /should not have +过去分词,表示应该做某事但实际上未做,或本不应该做但实际上做了, 译为“本(不)应该……”。如:

  I regret having left the work unfinished; I should have planned everything ahead carefully.

  (3)ought to have+过去分词,表示动作按理该发生了,但实际上未发生,译为“该……”,与should的完成式含义类似。如:

  The porter ought to have called the fire-brigade as soon as he saw the fire in the stock, which went up in smoke.

  (4)could have+过去分词,表示过去本来可以做但却未做,译为“完全可以……”。如:

  What you said is right, but you could have phrased it more tactfully.

  (5)may/might have + 过去分词,表示过去可以做但实际未做,译为“(那样)也许会……”。如:

  It might have been better to include more punchy statistics and photos of equipment in the introduction to further assist first-time office automation managers.

  3.几个情态动词常考的句型

  (1)may/might (just) as well“不妨,最好”,与had better相近。如:

  Since the flight was cancelled, you might as well go by train.

  (2)cannot/can’t…too… “越……越好,怎么也不过分”。注意这个句型的变体cannot…over…。如:

  You cannot be too careful when you drive a car.

  The final chapter covers organizational change and development. This subject cannot be overemphasized.

  (3)usedn’t或didn’t use to为used to (do)的否定式。

  (4)should 除了“应该”一层意思外,考研大纲还规定要掌握其“竟然”的意思。如:

  I didn’t expect that he should have behaved like that.

  相关推荐

  2012年考研备考:考研英语语法精要完整版

  2012年考研英语词汇刘一男词根简单记忆

  词汇攻略:徐绽2012版《考研英语词汇宝典》

看了本文的网友还看了
文章搜索
万题库小程序
万题库小程序
·章节视频 ·章节练习
·免费真题 ·模考试题
微信扫码,立即获取!
扫码免费使用
考研英语一
共计364课时
讲义已上传
53214人在学
考研英语二
共计30课时
讲义已上传
5495人在学
考研数学一
共计71课时
讲义已上传
5100人在学
考研数学二
共计46课时
讲义已上传
3684人在学
考研数学三
共计41课时
讲义已上传
4483人在学
推荐使用万题库APP学习
扫一扫,下载万题库
手机学习,复习效率提升50%!
版权声明:如果考研网所转载内容不慎侵犯了您的权益,请与我们联系800@exam8.com,我们将会及时处理。如转载本考研网内容,请注明出处。
官方
微信
扫描关注考研微信
领《大数据宝典》
下载
APP
下载万题库
领精选6套卷
万题库
微信小程序
帮助
中心
文章责编:zhangyuqiong