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C. should have taken D. would rather have taken
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9. Betty was concerned that her great social popularity a discouraging effect on the man she wanted to marry.
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A. should be B. had been C. will be D. might be
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10. The acts of parents live in children when all else which through the ear has been forgotten.
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A. may have been learned B. must have been learned
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C. would have been learned D. had been learned
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英语语法红宝书 第11章 动词时态
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11.1 一般现在时
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系动词be的一般现在时形式包括is (当主语是第三人称单数时)，am (当主语是I时)和are (当主语是you或复数概念时)；动词have的一般现在时形式有has（当主语是第三人称单数时）和have（当主语是I, you 或复数概念时）；其他动词一般现在时的第三人称单数形式为：在词尾加-s或-es, 复数形式为动词原形。
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以下探讨一般现在时的用法。
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表示现在的情况或状态
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I am a slow walker, but I never walk backwards.
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我走得很慢，但我从不后退。
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You are an unrepeatable miracle.
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你是一个无法重复的奇迹。
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表示经常发生的动作或反复出现的情况
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Winners often seek opportunity when losers want security.
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当失败者寻求安全的时候成功者寻求机遇。
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表示永恒真理或客观事实
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The early bird catches the worm.
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先出巢的鸟儿先得食。
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Repetition is the mother of skill.
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重复是技巧之母。
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