题目内容
10.My father wonders when personal computers .( )| A. | are invented | B. | were invented | C. | invented | D. | have invented |
分析 我爸爸想知道个人电脑是什么时候被发明的.
解答 答案:B 根据宾语从句when personal computers…,主语为personal computer"个人电脑是谓语动词"发明"invent的动作承受者,所以为被动关系.被动语态结构为"be+过去分词".选项A:一般现在时的被动语态,其结构为:am/is/are+过去分词;选项B:一般过去时的被动语态,其结构为:was/were+过去分词;C:一般过去时,主动语态;D:现在完成时,主动语态.故可排除C,D.又因个人电脑的发明是发生在过去的动作,故应用一般过去时的被动语态.故选B.
点评 此题考查句子的时态和语态.考生需先根据主语与谓语动词关系判断使用主动语态还是被动语态,再根据动作发生的时间判断是一般现在时还是一般过去时.
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