虚拟语气的特殊用 PPT课件.ppt

虚拟语气的特殊用_PPT课件虚拟语气的特殊用法
1、在错综条件句子中,虚拟条件从句和主句动作发生的时间不一致,
   因此,主句和从句的谓语动词应根据所指的时间选用适当的虚拟语气形式。例如:
1)If I were you,I wouldn\'t have missed the film last night.
 如果我是你,我就不会错过昨天晚上的那部电影。
(从句与现在事实相反,主句与过去事实相反。)
2)If he had followed the doctor's advice,he would recover already.
  如果他遵照医生的劝告,现在病就好了。
(从句与过去事实相反,主句与现在事实相反。)
2、在if虚拟条件句中,有时可把连词省去, 采用倒装语序,把谓语动词were或助动词did,had,should 移到句首构成非真实条件从句的另一种句型,其意思不变。例如:
1)Had we time to spare,we would be glad to go to the park.
如果能抽出时间,我们很乐意逛公园。
 2)Were it not for the discovery of electricity,the modern world would experience great inconveniece.
 假如没有发现电,现代世界将很不方便。
3、有时假设的情况不用if引导虚拟条件从句来表述,而用
介词(如without, but for等)引出的短语、分词(如supposing等)引出的短语、
并列连词(如or,otherwise,but,though等)、
由动词suppose引出的祈使句或通过上下文的意思来表达。此时句中谓语动词仍采用虚拟语气的相应形式。例如:
1)But for your advice,I would not be able to do this work.
 要不是你的劝告,我是不会做这份工作的。
2)Victor obviously doesn't know what's happened,otherwise he wouldn't have made such a stupid remark.
显然维克多不知道发生了什么事情。不然的话,他就不会说这样愚蠢的话了。
4、在一些表示愿望、建议、请求、命令等含义的动词后面的宾语从句中,谓语动词用动词原形或\"should +动词原形\"表示虚拟语气。这类动词有ask,demand, insist,order,propose,move,desire,require等。
They demanded that the aggressor troops(should)be withdrawn immediately.
 他们要求立即撤出侵略军。
 I moved that he(should)be discharged for his serious mistake.
 我建议,由于他犯有严重错误,应解除他的职务。
5、在"would(had)rather(would sooner,would as soon)+宾语从句"句型中,要求后面的宾语从句用虚拟语气。但这种虚拟语气表示的不是与事实相反的假设,而是一种尚未实现的愿望,其从句谓语动词用一般过去时。例如:
I would rather you came next Friday.
I'd just as soon you didn't speak rudely to her.