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Mobile phones are helpful in our daily l...

Mobile phones are helpful in our daily life. They ______ everywhere now.

A. use    B. are used    C. used    D. were used

 

B 【解析】句意:手机在我们日常生活中非常有用,它们现在到处都在使用。主语与动词之间是被动的关系,说明的是现在的情况,故运用一般现在时态的被动语态,答案为B。 点睛:英语的语态是通过动词形式的变化表现出来的。英语中有两种语态:主动语态和被动语态。 被动语态表示主语是动作的承受者,即行为动作的对象。 例如:English is spoken by many people.主语English是动词speak的承受者。 被动语态的构成: 被动语态由“助动词be+及物动词的过去分词”构成。人称、数和时态的变化是通过be的变化表现出来的。现以teach为例说明被动语态在各种时态中的构成。 一般现在时:am/is/are+taught 一般过去时:was/were+taught 一般将来时:will/shall be+taught 现在进行时:am/is/are being+taught 过去进行时:have/has been+taught 现在完成时:have/has been+taught 歌诀是:被动语态be字变,过去分词放后面。  
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