题目内容
7.It is said that potato chips ___ by mistake about a hundred years ago.( )| A. | were invented | B. | invented | C. | are invented |
分析 据说炸土豆片是大约一百年前被误打误撞地发明的.
解答 答案:A 根据about a hundred years ago可知,这是表示过去的时间状语,所以运用一般过去时态;又因为主语potato chips是动词invent的承受者,应该用被动语态.一般过去时态的被动语态的构成是:was/were+动词的过去分词,主语是复数,所以用助动词用were,故选A.
点评 判断动词的时态,要通过所给的时间状语或语境去判断动词存在的状态;判断动词的语态,要看看主语是谓语动词的执行者还是承受者.
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