/əˈgəʊ ||; əˈgo/adv in the past; back in time from now 之前；以前；过去:
Patrick left ten minutes ago (= if it is twelve o'clock now, he left at ten to twelve). 帕特里克十分钟前走了。That was a long time ago. 那是很久以前的事了。 How long ago did this happen? 这是多久以前的事？ Ago is used with the simple past tense and not the present perfect tense I arrived in Britain three months ago. Compare ago and before. Ago means ‘before now’ and before means ‘before then’ (that is before a particular time in the past) Anne married Simon two years ago. She had left her first husband six months before (= six months before she married Simon). ago 与简单过去时连用，不可与现在完成时连用：I arrived in Britain three months ago. 我三个月前到达英国。比较 ago 及 before。ago 指“现在之前”，before 指“那时之前”（即过去某一时间之前）﹕Anne married Simon two years ago. 安妮和西蒙两年前结婚。She had left her first husband six months before (six months before she married Simon). 她（和西蒙结婚的）六个月前跟前夫离异。