题目内容
17.Look at that sign.Smoking here.( )| A. | isn't allowed | B. | doesn't allow | C. | aren't allowed | D. | don't allow |
分析 看那个标志牌.这儿不允许吸烟.
解答 答案:A 根据Smoking here.可知这句话的主语是Smoking,它和动词allow构成被动关系,所以应该用被动语态.被动语态的构成:助动词be+及物动词的过去分词.看那个标志牌.这儿不允许吸烟.是说的现在的情况,应该用一般现在时.所以应该是isn't allowed,故选:A.
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,被动语态的构成:助动词be+及物动词的过去分词.
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