英语自学网 发表于 2016-7-10 18:22:13

语言学:英语知多少之英语时态(5)

 现在完成时
  基本结构:主语+have/has+过去分词(done)
  ①肯定句:主语+have/has+过去分词+其他
  ②否定句:主语+have/has+not+过去分词+其他
  ③一般疑问句:Have/Has+主语+过去分词+其他
  ④特殊疑问句:特殊疑问词+一般疑问句(have/has+主语+过去分词+其他\
  He has worked for us for ten years.
  Has he worked for us for ten years.
  过去完成时
  基本结构:主语+had+过去分词(done)
  ①肯定句:主语+had+过去分词+其他
  ②否定句:主语+had+not+过去分词+其他
  ③一般疑问句:Had+主语+过去分词+其他
  肯定回答:Yes,主语+had
  否定回答:No,主语+hadn't
  ④特殊疑问句:特殊疑问词+一般疑问句(had+主语+过去分词+其他)
  语法判定:
  ( 1 ) by + 过去的时间点。如:
  I had finished reading the novel by nine o'clock last night.
  ( 2 ) by the end of + 过去的时间点。如:
  We had learnt over two thousand English words by the end of last term.
  ( 3 ) before + 过去的时间点。如:
  They had planted six hundred trees before last Wednesday.
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