(1)与一般过去时常用的短语:yesterday, last year, three years ago, in 1980等,这些结构常常提示大家,这些句子中的谓语动作发生在过去,而与现在没有关系,如:
He lost a pen yesterday. (单纯的过去动作, 现在是否找到不知道)。
(2)某些副词或介词短语提示则说明其所在的句子要用现在完成时,如since, ever since, so far, up to now, recently, lately, in the past few days等,如: Ever since the first space flight made by Apollo 11 to the moon, the human beings have many more space explorations in the past 4 decades.
2(2010·江苏卷·T23)—Why, Jack, you look so tired!
—Well, I _____ the house and I must finish the work tomorrow.
A. was painting
B. will be painting
C. have painted
D. have been painting
【解析】选D。句意:——咦,杰克,你看起来这么累!——哦,我一直在粉刷房子,我必须明天完成这项工作。根据语境可知“粉刷房子”这个动作一直进行到现在,并且还要继续进行下去。所以应用现在完成进行时,选择D项。(2010·全国卷II·T9)Barbara is easy to recognize as she’s the only of the women who ____ evening dress.
A. wear
B. wears
C.has worn
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