题目内容
15．I my homework，I guess I can't join you．（ ）| A． | don't finish | B． | didn't finish | C． | haven't finish | D． | won't finish |
分析 我还没有做完作业，我想我不能加入到你们中间．
解答 答案：C．
根据I guess I can't join you，可知这里发生在过去的动作对现在造成了影响或结果，体现现在完成时，所以时态用现在完成时，现在完成时的构成：have/has+动词过去分词．故选 C．
点评 本题主要考查现在完成时，用法：表示过去发生或完成的动作对现在造成的影响或结果，还表示过去发生动作一直持续到现在．其结构是have/has+及物动词的过去分词．
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