本站微信

当前位置: 首页 > 中考 > 中考2019年必考的英语八大时态介绍之现在完成时(上)

中考2019年必考的英语八大时态介绍之现在完成时(上)

更新时间:2019-01-18


现在完成时
  标志:have / has + 动词的过去分词
  1. 表示一个过去发生并已完成的动作对现在产生影响或结果,强调的是现在的状况(表示“已完成”)。如:
  He has left the city. (结果:他目前不在这个城市)
  Someone has broken the window. (结果:窗户破了)
  2. 表示一个动作开始于过去,持续到现在,也可能还会继续持续下去(表示“未完成”)。
  I have been busy since last week.
  He has taught in our school for 30 years.
  I’ve finished half so far.
  注意 瞬间动词通常是不能用现在完成时表持续性的,但其否定结构则可以。如:
  She hasn’t seen you for ages.
  His father hasn’t touched beer for a whole week.
  3. 表示过去到现在为止反复发生的动作或多次出现的状态,常与表示频度的副词always, often, every day等连用。如:
  I have often heard that he is the cleverest person in that company.
  4. 在时间和条件状语从句中,现在完成时表示将来某时完成的动作。如:
  I’ll go to your home when I have finished my homework.
  If it has stopped snowing in the morning, we’ll go the park.
  5. 与现在完成时连用的常见词语
  能与现在完成时连用的词语很多,just, already, yet, before, never, ever, recently等,但常见的有:
  1) since 自从
  I have been there many times since the war.
  We haven’t seen each other since last week.
  We have been friends ever since.
  2) in / for / during the past/last … years 在过去/最近…中
  I’ve been ill for the past three weeks.
  Great changes have take place in the last ten years.
  I have been here (for) the last/past month.
  3) so far 到目前为止
  We haven’t had any trouble so far.
  So far the search for the missing middle-aged woman has been fruitless.
  4) up to/until now 到现在为止
  Up to now he’s been quiet.
  Up to now, the work has been easy.
  I have heard nothing from him up till now.
  Up till now we have planted over 2000 trees.
想要了解更多中考英语知识,尽在三思教育网。