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2019年中考必考的英语八大时态介绍之现在完成时

http://www.newdu.com 2019-01-02 中考网 佚名 参加讨论

    中考网整理了关于2019年中考必考的英语八大时态介绍之现在完成时,希望对考生们有所帮助,仅供参考。
    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.
    5)  It is/will be the first/second … time that … 这是第一/二…次…
    It’s the first time (that) I’ve been here.
    It will be the first time (that) I’ve spoken in public.
    It is the second time (that) I have met him today.
    6)  This is + 形容词最高级 + that … 这是最…
    This is the best film that I’ve (ever) seen.
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