考研英语语法重难点精解 虚拟语气

来源:中国研招信息网www.eduyz.net 作者:yzw 时间:2012-05-18 09:38:36
  •     核心提示:
 虚拟语气是谓语动词的一种形式,用来表示假设,或用来表示命令、建议以及说话人的主观愿望,有时也可以使语气缓和、委婉。虚拟语气作为一重点语法,在各类考试中占有相当大的分值,所以理解该语法,不管对于考试,还是在日常应用中都有相当大的作用,本节将就考试重点作详细讲解。

  一、虚拟语气的用法
  常用于条件句中,表示与现在、将来、过去相反的假设,表示与现在、将来、过去相反假设时,主句与从句谓语动词的变化形式,现以动词do为例说明。
  主句 从句 现在 would/should/could/might + do be→were/do→did 将来 would/should/could/might + do were to + do/should + do (只能用should) 过去 would/should/could/have done had done 注:有些语法书中在“与将来相反假设”的条件从句中也有do→ did,这样就和“与现在相反假设”的主句、从句完全相似,其主要区别在于各自的时间状语上,另外如果在“与将来相反假设”的条件从句中出现should+ do,那么主句中就避免使用should+do,可以用would/could/might+do。
  例句: If you were to examine the birth certificates of every soccer player in 2006s World Cup tournament, you would most likely find a noteworthy quirk.
  (选自2007年Text 1)
  分析: 该句是复合句。
  译文: 假如你去调查2006年世界杯上每位足球运动员的出生证明,你很可能会发现一个值得注意的现象。
  例句: If that happened, passionate consumers would try to persuade others to boycott products, putting the reputation of the target company at risk. (选自2011年Text 3)
  分析: 该句是复合句,表示与现在相反的假设。其中,分词短语putting the reputation of the target company at risk在句中作状语,表示结果。
  译文: 这种情况一旦发生,充满激情的消费者会尽力说服他人抵制产品,从而使目标企业的声誉处于危险境地。
  例句: Everything here would have been destroyed utterly, if his wife hadnt called the fire brigade.
  分析: 该句是复合句。
  译文: 要不是他的妻子给消防队打电话,这里的一切就被彻底地破坏了。

  二、混合式虚拟语气
  有时条件从句和主句时态不一致,可以根据主句、从句动作发生的时间分别运用相应的虚拟语气。
  例句: He would be studying at the university now if he had passed the entrance examination.
  分析: 该句是复合句,主句表示与现在相反假设,而从句表示与过去相反假设。
  译文: 如果他考试通过,现在就应该在大学里学习了。

  三、条件句中连词if省略
  若条件句中的if省略,则把were, had或should置于从句主语之前,形成半倒装句。
  例句: The businesses are risky, but should we succeed(but if we should succeed), we would be rich.
  分析: 该句是由but连接的并列句,其中should we succeed是省略if的倒装句。
  译文: 做生意是冒险的,但是如果我们成功了,我们就会很富裕。
  例句: The millions of calculations involved, had they been done by hand (if they had been done...),would have lost all practical value by the time they were finished.
  分析: 该句是复合句,had they been done by hand是省略if的倒装句,by the time引导状语从句。
  译文: 所涉及的数百万次运算,如果用手工进行,等到完成时,恐怕早就失去所有的实用价值了。

  四、使用介词或介词短语的条件句
  条件句中有时用without(with), but for, but+从句, under...condition, in the absence of (没有……在场)等介词或介词短语,也可通过上下文暗示来表示,而主句将根据情况运用相应的形式。
  例句: Without us there would have been no response to the invasion of Kuwait, no peace in Bosnia and no deal to halt North Koreas nuclear ambitions.
  分析: 该句是简单句,介词短语without us相当于从句if there had not been us。
  译文: 没有我们,就没有人制裁对科威特的入侵,波斯尼亚就没有和平,也就没有制止朝鲜的核野心的行动。
  例句: But for us, any number of nonproliferation, environmental and humanrights standards would be afar cry from what they are today.
  分析: 该句是复合句,介词短语but for us相当于从句if there werent us,what they are today作介词from的宾语。
  译文: 没有我们,任何防止核扩散、环保和人权水准都将与现在的标准大相径庭。

五、wish引导的虚拟语气从句
  if only...和would that...均可用I wish来代替,前面两者多出现在文学体裁中,而wish 多用于口语和日常用语中,wish引导的宾语从句中谓语动词用虚拟语气,可译为“但愿……”,“要是……该多好啊”,“真希望……”等,从句中谓语动词形式如下。
  从句(例词do) 用法 动词用过去式did或were表示现在未实现的愿望 动词用过去完成时had done 表示过去未实现的愿望 动词用would/could/might do 表示将来不大可能实现的愿望 例句: The senior librarian at the circulation desk promised to get the book for me if only she could remember who last borrowed it. (1996年第3题)
  分析: 该句是复合句。
  译文: 图书借还台的高级图书管理员答应借我那本书,她要是记得上一次谁借了那本书就好了。
  例句: I wish I had slept longer this morning, but I had to get up and come to class.
  分析: 该句是复合句,I had slept longer this morning表示与过去事实相反假设。
  译文: 要是今早能多睡一会儿该多好啊,但我不得不早起来上课。

  六、个别特殊短语
  would rather, had rather, had better, would (just) as soon, would sooner均作“但愿,宁愿”讲时:
  (一)后接动词原形,表示现在或将来的一种主观愿望或选择
  例句: 1 would rather go there with you, because you are the only person that I have been acquainted with.
  分析: 该句是复合句,定语从句that I have been acquainted with修饰the only person。
  译文: 我宁愿和你一起去那儿,因为你是我在这里唯一熟悉的人。
  (二)后接从句,从句动词一般用一般过去时表示现在或将来的愿望,动词用过去
  完成时表示过去的愿望
  例句: Id rather he stayed there, because weather is said to be somewhat worse according to the news.
  分析: 该句是复合句,weather is said to be...是it is said that...的变形。
  译文: 我希望他待在那儿,因为据新闻报道天气将会很恶劣。
  例句: Id rather you had not been so rude to her, she was a new comer after all.
  分析: 该句是复合句,其中after all意为“究竟,毕竟”,you had not been so rude to her表示与过去事实相反假设。
  译文: 真希望你不要对她那么粗鲁,毕竟她是新来的。

  七、as if/as though引导的方式状语从句
  表示“仿佛,好像”时也用虚拟式,从句中动词用一般过去时(be用were)表示与现在相反假设;动词用would/could/might+动词原形表示与将来相反假设;动词用过去完成时表示与过去相反假设。
  例句: The rats develop bacterial infections of the blood as if their immune system—the self protecting mechanism against disease—had crashed.
  分析: 该句是复合句,as if their immune system had crashed是方式状语从句,两个破折号间的内容是对system做进一步的解释。
  译文: 老鼠感染血液病毒后,似乎它们的免疫系统——即抵御疾病的自我保护机制——被彻底摧毁了。
  例句: But its not as if earlier times didnt know perpetual war, disaster and the massacre of innocents. (选自2006年Text 4)
  分析: 该句是复合句,as if引导的方式状语从句在句中作表语。
  译文: 但是这不是说以前的时代没有经历过连续不断的战争、灾难和滥杀无辜。
  另外,as if(as though)后面的从句也可用陈述语气,尤其在it looks/seems as if(as though)结构中。
  例句: The sun rises in the east and sets in the west, so it seems as if the earth is circling round the sun.
  分析: 该句是复合句,as if引导一个表语从句,表示客观情况。
  译文: 太阳在东方升起西边落下,好像是地球围着太阳转。

news


  • 地图
  • 中国考研网论坛
中国研招信息网