that从句类型辨别

2008-08-22 08:30:24   来源:转载   评论:0 点击:

    区分that引导的定语从句、同位语从句、主语从句和强调结构,可采用成分法、试加法、试减法、还原法。
    1. 定语从句可用成分法分析,若that在从句中充当主语或宾语,则此从句为定语从句。如:
    A plane is a machine that can fly. (that充当主语)
    You must do everything that I do. (that充当宾语)
    2. 同位语从句可用试加法,即在名词和从句之间加系动词be,使该名词和从句构成一个系表结构的句子,如果句子通顺且合乎逻辑,那么该从句就是同位语从句。如:
    The fact that he had not said anything surprised everybody. (可改写为:The fact was that he had not said anything.)
    3. 改写后的主语从句可用还原法,即把that引导的从句调到句首,去掉句首的It,再加句子的剩余部分,如果新句子意思不变,合乎逻辑,则该从句为主语从句。如:
    It’s a rule that he gets up at six o’clock every morning. (可改写为:That he gets up at six o’clock every morning is a rule.)
    4. 强调结构采用试减法,即把句子中的It be ... that ...这一框架去掉,如句子剩余部分(位置可以适当调整)意思通顺,合乎逻辑,that就是强调结构的标志。如:
    It was the goat’s eyes that he had seen in the darkness. (可改写为:He had seen the goat’s eyes in the darkness.)

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