ago是什么意思,before与ago区别?



ago单独充当状语,应该用一般过去时 。
如:He has lived in the city since three years ago (他从三年前起就住在这个城市) 。
ago用法比较固定,
例如:5 years ago(五年前),10 tens ago(十年前),long long ago(很久以前) 。


ago是什么时态的标志


如果用在since ... ago结构中,则需要用现在完成时或一般现在时 。


例如:
He has lived in the city since three years ago(他从三年前起就住在这个城市).


I have taught English since ten years ago(自从十年前以来,他一直都教英语

ago是什么意思,before与ago区别?

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before与ago区别?
before与ago的中文意思是一样的都是“以前”但before 是现在完成时的标志词,而ago是一般过去时的标志词 。
例如,你以前听过这个故事吗?
Have you heard of this story before?
或Didyou hear of this story ago?
两天前我去参观了秦始皇兵马俑,以前我从未到过 。
【ago是什么意思,before与ago区别?】Two days ago, I went to visit the Terracotta Warriors and Horses of the First Emperor of Qin Dynasty. I had never been there before.