练习册

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    [要点点拨]动词不定式表现为两种形式:to do 或 do.在句中可作:1.主语: To build the bridge needs much money. 一般用 It作形式主语放在句首.把不定式短语放于句末. It doesn’t make any difference whether you go today or tomorrow. 【查看更多】

     

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