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ago/before Ⅰ. ago adv. 以前指从此刻起，若干时间以前，通常与过去连用。如： ① It happened two days ago.这件事发生在两天以前。 ② I met him a few minutes ago.我在几分钟以前碰到他。 Ⅱ. before adv, prepconj 以前指从那时起若干时间以前。通常与完成时、过去时等连用。还可用作前置词或连接词表时间，而ago 则不能这样用。 ① He said that he had seen her two days before.他说他两天前见到过她。（表从她说话那时起两天前） ② I had been fine the day before.(那天)前一天的天气很好。 ③ Ive seen that film before. ④ I never met him before. agree to/ agree with/ agree on(up on) Ⅰ. agree to 同意、应允通常用于同意某件事情（我们可以同意我们自己有不同看法而并不赞同的事情）。如： ① Do you agree to this plan? ② He agreed to my proposal.他同意了我的提议。 ③ I agreed to his terms. 我同意了他的条件。 Ⅱ. agree with 同意、赞同常常表示同某人意见一致，也可表赞同某件事情。还有（气候、食物等）适合之意。如： ① I quite agree with you.我很同意你。 | 
