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标题 一般过去时的构成及用法
内容
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    一般过去时的构成及用法
    一般过去时表示过去的动作或过去存在的状态,由动词的过去式构成。动词be的过去式为was/were, have的过去式为had. 除不规则动词外,其他动词的一般过去式通常都是在词尾加-ed.
    规则动词的过去式规则
    1.大部分在词尾直接加-ed
    mend-mended wait-waited
    talk-talked discuss-discussed
    2.以-e 结尾的动词,词尾只加-d
    replace-replaced assemble-assembled
    phone-phoned advise-advised
    3.以重读闭音节结尾的动词,双写词尾的辅音
    后,再加-ed
    fit-fitted stop-stopped
    occur-occurred stab-stabbed
    4.以辅音字母+y结尾的动词,先将y变为i,再加-ed
    try-tried occupy-occupied
    5.以-ic 结尾的动词,先在词尾加K,再加-ed
    picnic-picnicked traffic-trafficked
    一般过去时的用法
    1.表示过去某一确定时间发生的动作或存在的状态,可能是一次性的,也可能是过去经常反复发生的,常与表示过去时间的状语连用.
    He lost his purse yesterday.
    It was very cold last night
    Last year we were rather busy.
    When he was a child,he observed things carefully.
    He always got up too late, and never had enough time for breakfast.
    2.用于虚拟语气中,表示对现在或将来的假设,主观意图或愿望等.
    I wish l had your brains, I'm too stupid.
    3.在时间、条件状语从句中,常用一般过去时代替过去将来时,表示过去将来的动作。
    They said they would let us know if they heard any news about him.
    
    
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更新时间:2025/5/22 16:20:04