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望花小区旁边英语1对1培训班名思教育

更新时间:2017/5/20 16:07:33    纠错/删除/投诉
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详细内容:
一、主动形式表示被动意义
  1. 动词need, want, require表示"需要时",后接动名词或不定式的被动式表示被动意义。如:
  Your room needs cleaning/to be cleaned. 你的房间需要打扫一下。
  My house requires repairing/to be cleaned. 我的房子需要修理一下。
  2 在"be worth doing"短语中,动作与主语之间存在动宾关系,用主动形式表示被动意义。如:
  This book is well worth reading 这本书很值得一读。
  3. 在"主语 +be + adj +to do"这个句型中,不定式动作与主语之间存在动宾关系,则用主动形式表示被动意义。如:
  This question is hard to answer. 这个问题很难回答。
  English is easy to learn. 英语很好学。
  4.连系动词(如:feel,taste,sound,smell,look等)用主动形式表示被动意义。如:
  This material feels very soft. 这块材料摸上去很柔软。
  This apple tastes good. 这个苹果尝起来很好吃。
  5. 有些表示主语内在性质或性能的不及物动词常与一些副词连用,用一般现在时的主动形式表示被动意义,其主语一般为事物。这些动词有:sell,read, write,wash,wear,last等。如:
  The pen writes smoothly 这支笔写起来很流畅。
  This kind of food sells well. 这种食物很畅销。
  6. Won't或wouldn't表示"不愿"时,后面的动词常用主动形式表示被动意义。如:
  The door won't open. 这门就是打不开。
  This box wouldn't move. 这个盒子就是移不动。
  二、since和for
  Since 用来说明动作起始时间,for用来说明动作延续时间长度。例如:
  I have lived here for more than twenty years.我住在这儿二十多年了。
  I have lived here since I was born. 我从出生起就住在这儿了。
  注意:并非有for 作为时间状语的句子都用现在完成时。
  I worked here for more than twenty years. (我现在已不在这里工作。)
  I have worked here for many years.(现在我仍在这里工作。)
  注意:用句型转换的方法,很容易排除非延续动词在有for/since结构的完成时中的误用。
  1)(对) Tom has studied Russian for three years. = Tom began to study Russian three years ago, and is still studying it now.
  2)(错) Harry has got married for six years. = Harry began to get married six years ago, and is still getting married now.
  显然,第二句不对,它应改为 Harry got married six years ago. 或 Harry has been married for six years.(联系我时,请说明是在博发网看到的,谢谢!)

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