中考英语重要短语的用法及区别：ago before
<p> 中考英语重要短语的用法及区别：<span word="ago">ago</span> , <span word="before">before</span></p><p> (1)<span word="ago">ago</span>立足于现在，表示从现在起，若干时间之前;<span word="ago">ago</span> 通常与一般过去时连用，不能与完成时连用;</p><p> <span word="I">I</span> <span word="met">met</span> <span word="him">him</span> <span word="three">three</span> <span word="years">years</span> <span word="ago">ago</span> .(距今)三年前，我遇到他。</p><p> (2)<span word="before">before</span>立足过去，表示从过去某一时刻起，若干时间以前。<span word="before">before</span>通常与过去完成时连用。</p><p> <span word="I">I</span> <span word="had">had</span> <span word="met">met</span> <span word="him">him</span> <span word="three">three</span> <span word="years">years</span> <span word="before">before</span> .(距当时)三年前我见到他一次。</p>
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