题目内容
16.关于如何解决食品安全问题的节目已结束两个小时了.The program onhow to solve the problem of food safetyhas been over for two hours.
分析 how to solve; has been over.
解答 答案:how to solve; has been over.结合中英文第一个空格是要表达如何解决问题,作为介词on的宾语,我们用疑问词+to do 结构,疑问词how怎样,解决solve,故how to solve.这里结束finish这个动词发生在过去,并持续了一段时间用现在完成时have/has+过去分词,主语是the program三单,故has,finish是短暂性动词,不能和for two hours一段时间连用,故换成be over,be 的过去分词是been,故答案是how to solve; has been over.
点评 延续性动词可以与以since,for,how long等引导的表示一段时间的状语连用. 例如:He has lived here for 6 years.
How long did you stay there last year?
短暂性动词也称终止性动词、非延续性动词或瞬间动词,表示不能延续的动作,这种动作发生后立即结束.如:open,die,close,begin,finish,come,go,join,borrow,lend,buy,arrive,reach,start,marry,end等
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