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多少年就用延續(xù)性動詞的現(xiàn)在完成時,has been dead。13.—I haven39。t seen your grandfather for two years. What happened to him?—Oh, he ________ here for two years.A.stayedB.hasn39。t stayedC.staysD.hadn39。t stayed【答案】 B 【解析】【分析】答語中的for two years是一段時間,用在現(xiàn)在完成時的句中時。現(xiàn)在完成時的結構:主語+have/ has +過去分詞。可知選B?!军c評】考查現(xiàn)在完成時14.Mike used to be a top student, but he behind since he lost himself in puter games.A.fellB.has fallenC.wasD.has been【答案】 D 【解析】【分析】句意為“Mike過去是尖子生,但自從迷上電子游戲以來成績落后了”。由since可知but后的主句用現(xiàn)在完成時,瞬間動詞fall不能和since引導的時間狀語從句連用,故用延續(xù)性動詞be。故選D?!军c評】本題考查現(xiàn)在完成時中非延續(xù)性動詞和延續(xù)性動詞的轉換。15.So far Tom with Mary _______ 50 left behind children to do their homework after school.A.helpB.helpedC.has helpedD.have helped【答案】 C 【解析】【分析】此題要掌握現(xiàn)在完成時的時間狀語及主語+with 短語是單數(shù)的概念,即可得出答案。選C。16.Mike began to work in the factory in 2013.He there for four years. A.is workingB.was workingC.worksD.has worked【答案】D 【解析】【分析】句意:邁克在這里工作已經(jīng)4年了。一直持續(xù)的狀態(tài)用現(xiàn)在完成時。故D選項正確?!军c評】考查現(xiàn)在完成時。17.His cat has ________ for five weeks.A.diedB.been deadC.dyingD.dies【答案】 B 【解析】【分析】句意:他的貓已經(jīng)死了5個星期了。die是短暫性動詞,不能表示狀態(tài)的延續(xù)。 由時間狀語 for five weeks可知應用延續(xù)性動詞,故答案選B。【點評】考查現(xiàn)在完成時。18.A number of tourists _____ Yangzhou many times because such a beautiful city. A.have been toB.has been toC.has gone toD.have gone to【答案】 A 【解析】【分析】句意:很多游客多次去過揚州,因為它是如此美麗的一個城市。have been to,表示去過某個地方,have