时间:2019-02-04 作者:英语课 分类:英文语法词汇


英语课

   whether与that均可引导名词从句,该如何区别呢?


  __________ we’ll go camping tomorrow depends on the weather.
  A. If B. Whether C. That D. When
  此题应选 B。容易误选A,C。
  1. 关于if与whether:两者都可引导宾语从句,常可换用; 但若引导主语从句,则用whether (不用if),排除A。又如。如:
  他是否会来还是个问题。
  误:If he will come is a question.
  正:Whether he will come is a question.
  2. 关于whether和that:两者都可引导主语从句,其区别主要应从句意来考虑:whether表示“是否”,由它引导的主语从句的意思通常是不确定的;that 引导主语从句时,本身没有词义(that在其他名词性从句中也没有词义),但是由that引导的整个主语从句的意思通常是确定的。试比较:
  1. a. That we’ll hold a meeting is decided 1. 我们要召开一次会议,这已决定了。
  b. Whether we’ll hold a meeting is not decided. 我们是否要开一个会,这还没有决定。
  2. a. That he has left here is clear. 他已离开了这儿,这点很清楚。
  b. Whether he has left here is not clear. 他是 否已离开这儿,这还不清楚。
  3. a. That he can finish it in two hours is clear. 他能在两小时内完成它,这是显然的。
  b. Whether he can finish it in two hours is a question. 他能否在两小时内完成它还是问题。

adj.决定了的,坚决的;明显的,明确的
  • This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
  • There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。
标签: 名词从句
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