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高中英语语法:虚拟条件句的倒装

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标签:高中英语语法大全,高中英语语法总结,http://www.350xue.com 高中英语语法:虚拟条件句的倒装,
虚拟条件句的从句部分含有were, should, 或had时, 可省略if,再把were, should或had 移到从句的句首,实行倒装。例如:
  Were they here now, they could help us. =If they were here now, they could help us.他们现在在的话,就会帮助我们了。
  Had you come earlier, you would have met him. =If you had come earlier, you would have met him.你来得早一点,就碰到他了。
  Should it rain, the crops would be saved. =Were it to rain, the crops would be saved.假如下雨,庄稼就有救了。
  注意:在虚拟语气的从句中,动词'be'的过去时态一律用"were",不用was,即在从句中be用were代替。例如:
  If I were you, I would go to look for him. 如果我是你,就会去找他。
  If he were here, everything would be all right. 如果他在这儿,一切都会好的。
  典型例题
  _____ to do the work, I should do it some other day.
  A. If were I   B. I were C. Were I D. Was I
  答案C. 在虚拟条件状语中如果有were, should, had这三个词,通常将if省略,主语提前, 变成 were, should, had +主语的形式。但要注意,在虚拟条件状语从句中,省略连词的倒装形式的句首不能用动词的缩略形式。如我们可说 Were I not to do, 而不能说 Weren't I to do.

表示比较程度差别关系的前缀
  1)by-, 表示“副,次要的”
  byproduct, bywork(副业)
  2)extra-,表示“超越,额外”
  extraordinary,
  3)hyper- 表示“超过,极度”
  hypersonic(超声波), hypertesion(高血压)
  4)out-,表示“超过,过分”
  outdo(超过), outbid(出价过高的人)
  5)over-,表示“超过,过度,太”
  overeat, overdress, oversleep
  6) sub-, suc-, sur-, 表示“低,次,副,亚”
  subeditor, subordinate, subtropical(亚热带)
  7)super-, sur- 表示“超过”
  supernature, superpower, surplus, surpass
  8)under-,表示“低劣,低下”
  undersize, undergrown, underproduction(生产不足)
  9)vice- 表示“副,次”
  vicepresident, vicechairman



高中英语语法:虚拟条件句的倒装
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