题目内容
12.Cowsare fed (feed) on grass.They like eating grass.分析 用草喂牛.他们喜欢吃草.
解答 答案:are fed 根据Cows___(feed) on grass.可知主语Cows是动作的承受者,与动词feed构成被动关系,应该用被动语态.根据They like eating grass.他们喜欢吃草.可知这是在说牛的特点,应该用一般现在时态.一般现在时的被动语态的构成:am/is/are+及物动词的过去分词.主语cows,是复数,所以应该是are,故填:are fed.
点评 主要考查被动语态,当句子的主语是动作的承受者时,应该用被动语态,本题考查的是一般现在时态的被动语态.一定注意其构成形式,一般现在时的被动语态的构成:am/is/are+及物动词的过去分词.
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