问题补充:
It is five years since my dear aunt here.
A. left
B. has left
C. is left
D. had left
答案:
(答案→)A. left
B. has left
C. is left
D. had left
解析:since,for作为连词,引导时间状语(从句)如果谓语动词是延续性的一般过去时,其表达的含义是从这个动作结束以来,恰好和动词的词义相反,具有否定的含义;如果谓语动词是非延续性的一般过去时,其表达的含义是从这个动作开始以来,恰好和动词的词义一致,具有肯定的含义
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