题目内容
20．我国的太空船已经围绕地球飞行了二十多小时．Our spaceshiphas flown aroundthe earth for more than twenty hours．
分析 has flown around．
解答 答案：has flown around．这里的飞行（fly）这个动作一开始发生在过去，持续了二十多个小时用现在完成时have/has+过去分词，主语是Our spaceship单数，fly的过去分词是flown故has flown，围绕用介词around，故答案是has flown around．
点评 这里是现在完成时的考查，这里一定要注意不规则动词的过去分词．
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