题目内容
17.Weixin(微信) chatting on the mobile phone by many people,and it's very helpful.( )| A. | is used for | B. | is used to | C. | is used as | D. | is used by |
分析 微信是人们用来手机聊天的,很有用.
解答 答案:A.
这里表达的是客观事实用一般现在时,主语weixin是动词use的 承受者,故用一般现在时的被动语态be+过去分词,表示用来做某事,结合chatting用介词for,故答案是A.
点评 被动语态是动词的一种特殊形式,一般来说,只有需要动作对象的及物动词才有被动语态.汉语往往用"被"、"受"、"给"等被动词来表示被动意义.被动语态由"助动词be+及物动词的过去分词"构成.被动语态的时态变化只改变be的形式,过去分词部分不变.疑问式和否定式的变化也如此.
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