题目内容
10.Computers are very useful in our lives,but they must properly.( )A. | use | B. | be using | C. | be used |
分析 电脑在我们的生活中很有用,但是必须恰当地使用他们.
解答 答案C 情态动词的被动语态的构成:情态动词+be+过去分词.本题中的they指的是前面的computers,可知对于电脑来说是被使用的,所以要用情态动词的被动语态.故选C.
点评 首先要掌握情态动词的被动语态的结构,然后再根据主语是谓语动作的承受者,就可以确实使用情态动词的被动语态.
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