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    精英家教网 > 初中英语 > 题目详情
    Look! David is helping his mother _______ the room.
    A．is cleaningB．cleaning C．cleans D．clean
    D

    试题分析：句意：看！戴维正在帮助他的妈妈整理房间。help sb (to)do sth帮助某人做某事，故选D
    点评：现在进行时表示动作正在进行，由be + doing构成，be为助动词。初学者最容易漏掉，它应与主语的人称和数保持一致。习惯于look（看），listen（听）等表动作的动词连用。
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