题目内容
8.Half of the class most of the work.Some of the work really difficult.( )| A. | have done; is | B. | has done; are | C. | has done; is | D. | have done; are |
分析 一半的学生已经做了大部分的工作,一些工作真的很难.
解答 答案:A.第一个空格做表达的动作发生在过去,对现在造成一定的影响,故用现在完成时have/has+过去分词,主语Half of the class指的是一半的学生,class指的是集体名词,故用have,后文指的是客观事实用一般现在时,主语work不可数名词,故is,故答案是A.
点评 现在完成时有两种用法1.过去发生的某一动作对现在造成的影响或结果或到现在为止已经发生或完成的动作.2.表示过去发生的、持续到现在的动作或状态.
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