用括号内所给动词的适当形式填空 1.The real reason why prices _______(be), and still are, too high is complex, and no short discussion can satisfactorily explain this problem.(2015江苏) 2.During the last three decades, the number of people participating in physical fitness programs________(increase) sharply.(2017浙江) 【答案】1.were 2.has increased
三、现在完成时和现在完成进行时的区别 现在完成进行时强调动作,而现在完成时强调结果。
I have finished the task. 我已完成任务了。(做完了) I have been working. 我一直在工作。(未做完) 用括号内所给动词的适当形式填空 1.In the last few years, China ____ (make)great achievements in environmental protection.(2015北京) 2.Marty______(work) really hard on his book and he thinks he'll have finished it by Friday.(2015陕西) 3.—Tony, why are your eyes red? —I _________________(cut) up peppers for the last five minutes.(2017江西) 4.Since the time humankind started gardening, we _________________(try)to make our environment more beautiful.(2017湖南) 5.The reports went missing in 2017 and nobody_______(see) them since.(2017大纲卷)
【答案】1.has made 2.has been working 3.have been cutting 4.have been trying 5.has seen
四、一般过去时与过去完成时的区别 1.一般过去时表示过去发生的动作或存在的状态,而过去完成时则表示动作或存在的状态是在过去某一时间以前发生的,即“过去的过去”。
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