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2019年12月英语四级语法:before的用法

http://www.newdu.com 参加讨论 2020/3/29


    英语四六级频道为备考英语四级的同学们整理了2019年12月英语四级语法:before的用法,希望可以为大家带来帮助,预祝大家高分通过大学英语四级考试。
    一、可以用作介词
    ⒈)指时间上早于,在……之前,如:
    She has lived here since before the war.
    她从战前就一直在这儿住。
    ⒉)指位置在前面,如:
    We knelt down before Grandma's grave.
    我们在奶奶的墓前跪下。
    ⒊)指顺序或排列在之前,如:
    Your name comes before mine on the list.
    名单上你的名字在我之前。
    ⒋)在某人面前,如:
    She said it before the witness.
    他是当着证人的面说的。
    二、作为连词
    其基本含义是“在……之前”,又可以根据不同语境灵活翻译成“才”、“还没来得及就……”、“趁……”、“就”等。具体用法如下:
    ⒈)与情态动词can/could连用
    这时候从句虽为肯定形式,根据汉语表达习惯译成“还没来得及就”,如:
    Before I could get in a word,he had measured me.
    我还没来得及插话他就为我量好了尺寸。
    Before she could move,she heard a loud noise,which grew to a terribl eroar.
    她还没来得及迈步,就听见一声巨响,接着就是可怕的隆隆轰鸣。
    ⒉)用于肯定句中强调主句所表达的时间,距离长,或花费的精力大,译成“才”
    We had sailed four days and four nights before we saw lands.
    我们航行了四天四夜才看到陆地。
    We waited a long time before the train arrived.
    我们等了很长时间火车才到。
    ⒊)用于否定句中,强调主句所表达的时间,距离短,或花费的精力小,译成“不到……就”如:
    We hadn't run a mile before he felt tired.
    我们跑了还不到一英里他就累了。
    ⒋)主句含有hardly,scarcely等半否定副词时可以译为“刚……就”
    这时候主句应用过去完成时态,从句用过去时,还可以用when替代before如:
    We had scarcely reached the school before/when the bell rang.
    我们刚到学校铃声就响了。
    ⒌)有时还有“宁愿”的意思
    I'd shoot myself before I apologized to him.我宁死也不向他道歉。
    ⒍)用于It+be/take+时间段+before句型
    在这一句型中又可以根据主从句的时态分成两种情况。
    若主句是一般时将来时态,从句是一般现在时.若主句是肯定句意思是“要过多长时间才”;若主句是否定形式翻译成“用不了多久就”。
    It will be two weeks before everything returns to normal.
    两周之后一切才能恢复正常。
    It will be many years before the situation improves.
    这种状况或许要过许多年才能得以改善。
    It won't be long before we meet again.用不了多久我们就会再见面的。
    这时若主句是一般过去时从句也是一般过去时。若主句是肯定句翻译成“多长时间之后才”,若主句是否定形式翻译成“没过多久就”。如:
    It was some time before I realized the truth.
    过了很长一段时间我才了解到真相。
    It wasn't long before she became a brave solider.
    没过多久她就成了一名勇敢的战士。
    After that it still took seven years before they got married.
    他们又过了七年才结婚。
    注意:当主句的谓语动词为延续性动词时,before与until有时可以互换。It was an hour before/until the police arrived.
    巩固练习
    ⒈(2004天津)It was evening ________ we reached the little town of Winchester.
    Athat B.until C.since D.before
    2.(2004全国)Several weeks had gone by ________ realized the painting was missing.
    A.as B.before C.since D.when
    3.(2005广东)The America Civil War lasted four years ______ the North won in the end.
    A.after B.before C.when D.then
    4.(2005山东)It was some time _______ we realized the truth.
    A.when B.until C.since D.before
    5.(2006四川)-Why didn't you tell him about the meeting?
    -He rushed out of the classroom _______ I could say a word.
    A.before B.until C.when D.after
    6.(2006福建)-How long do you think it will be __ china sends a manned spaceship to the moon?
    -Perhaps two or three years.
    Awhen B.until C.that D.before
    参考答案:DBBDAD
    


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