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They were here just now.改为一般疑问句

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They were here just now.改为一般疑问句
首先看一下什么是一般疑问句:
一般疑问句是疑问句的一种.它是指用yes(是)或no(否)来回答的句子.其结构是:
  系动词be/助动词/情态动词+主语+其他成分
  通常回答为:
  肯定:Yes,+主语+提问的助动词.
  否定:No,+主语+提问的助动词+not.
  如:
  Are you from Japan﹖
  Yes I am. / No I'm not.
 1.将陈述句变为一般疑问句时,如句中有be 动词(am/ is/ are)时,可直接将它们提至主语前.如主语为第一人称,应将其改为第二人称.如:
  I'm in Class 2Grade 1. →
  Are you in Class 2Grade 1﹖
  We're watching TV. →
  Are you watching TV﹖
  2.陈述句中有情态动词(can、may、must …)时,也可直接将它们提至主语前,即可成为一般疑问句.如:
  He can swim now. →
  Can he swim now﹖
  The children may come with us. → May the children come with us﹖
  3.陈述句中只有一个实义动词作谓语且其时态为一般现在时,变为一般疑问句时要在句首加do或does 主语后的实义动词用原形.如:
  I like these animals. →
  Do you like these animals﹖
  She wants to go to the movies. → Does she want to go to the movies﹖
  4.一般疑问句一般读升调(↑)
  5.一般疑问句有时不用yes或 no 回答.如:
  Are they in town now﹖
  I think so.
  May I sit here﹖
  Certainly.
  Does he like soccer﹖
  Sorry I don't know.
综上所述:将They were here just now.改为一般疑问句为:Were they here just now?
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