从零开始学语法：may have done用法小结
<p> <span word="may">may</span>/<span word="might">might</span> <span word="have">have</span> <span word="done">done</span> 推测过去</p><p> <span word="may">may</span>/<span word="might">might</span>+动词的完成式表示对过去发生的行为的推测。例如：</p><p> -<span word="Whatever">Whatever</span> <span word="has">has</span> <span word="happened">happened</span> <span word="to">to</span> <span word="George">George</span>?</p><p> -乔治发生了什么事?</p><p> -<span word="I">I</span> <span word="dont">dont</span> <span word="know">know</span>. <span word="He">He</span> <span word="may">may</span> <span word="have">have</span> <span word="got">got</span> <span word="lost">lost</span>.</p><p> -我不知道，他可能迷路了。</p><p> <span word="You">You</span> <span word="might">might</span> <span word="have">have</span> <span word="read">read</span> <span word="about">about</span> <span word="it">it</span> <span word="in">in</span> <span word="the">the</span> <span word="papers">papers</span>.</p><p> 你可能在报上已经看过这个消息了。</p><p> (之前我们做过<span word="can">can</span> <span word="have">have</span> <span word="done">done</span>用法小结，<span word="can">can</span> <span word="have">have</span> <span word="done">done</span>表推测时都是对过去进行推测，但是<span word="may">may</span> <span word="have">have</span> <span word="done">done</span>不仅可以推测过去)</p><p> <span word="may">may</span>/<span word="might">might</span> <span word="have">have</span> <span word="done">done</span> 推测现在</p><p> <span word="may">may</span>/<span word="might">might</span>+动词的完成式表示对现在情况的推测。例如：</p><p> <span word="She">She</span> <span word="might">might</span> <span word="have">have</span> <span word="got">got</span> <span word="up">up</span> <span word="now">now</span>.</p><p> 现在她可能已经起床了。</p><p> <span word="may">may</span>/<span word="might">might</span> <span word="have">have</span> <span word="done">done</span> 预测未来</p><p> <span word="may">may</span>/<span word="might">might</span>+动词的完成式表示推测将来某时之前的情况。例如：</p><p> <span word="He">He</span> <span word="may">may</span> <span word="have">have</span> <span word="left">left</span> <span word="when">when</span> <span word="you">you</span> <span word="get">get</span> <span word="there">there</span>.</p><p> 等你到达的时候他可能已经离开了。</p><p> 注意：<span word="may">may</span> <span word="have">have</span> <span word="done">done</span> 和 <span word="might">might</span> <span word="have">have</span> <span word="done">done</span> 表推测时，<span word="might">might</span> 所表示的可能性比 <span word="may">may</span> 小，语气较委婉：</p><p> <span word="How">How</span> <span word="quickly">quickly</span> <span word="time">time</span> <span word="passed">passed</span>! <span word="It">It</span> <span word="might">might</span> <span word="have">have</span> <span word="happened">happened</span> <span word="yesterday">yesterday</span>.</p><p> 时间过得好快啊!这事好像就发生在昨天。</p>
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