词语辨析(八)
ago / before
ago 是副词,意思是以前。它指从此刻起若干时间以前,通常与过去时连用。例如:
It happened two days ago.这件事发生在两天以前。
I met him a few minutes ago.我在几分钟以前碰到他。
before 也可以用作副同,表示以前,但它是指从那时起若干时间以前,与完成式连用。例如:
He said that he had seen her two days before.他说他两天以前见到她。(这里表示从他说话那时起两天以前)
It had been fine the day before.(那天)前一天的天气很好。
此外,before 也可以泛指以前,与完成式或过去时连用。例如:
I've seen that film before.我以前看过那部影片。
I never met him before.我以前从未见过他。
〔注〕before还可以用作前置词或连接词表示时间,ago 不能这样用。
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