过去完成时的语法讲解
<p>过去完成进行时</p><p>表示一个动作从过去某时开始，一直延续到另一个过去时刻，到那个时刻，该动作可能刚刚终止，也有可能还在继续。</p><p>形式</p><p><span word="had">had</span> <span word="been">been</span> + <span word="V">V</span>-<span word="ing">ing</span>形式</p><p>用法</p><p>1. 过去完成进行时所表示的动作与过去的时间的关系，可以用时间状语来表示，也可以通过上下文来表示。例如：</p><p><span word="By">By</span> <span word="the">the</span> <span word="end">end</span> <span word="of">of</span> <span word="last">last</span> <span word="month">month</span> <span word="they">they</span> <span word="had">had</span> <span word="been">been</span> <span word="working">working</span> <span word="here">here</span> <span word="for">for</span> <span word="about">about</span> <span word="ten">ten</span> <span word="days">days</span>. 到上个月为止，他们在这里工作大约有十天了。</p><p><span word="She">She</span> <span word="said">said</span> <span word="that">that</span> <span word="she">she</span> <span word="had">had</span> <span word="been">been</span> <span word="listening">listening</span> <span word="to">to</span> <span word="radio">radio</span> <span word="after">after</span> <span word="school">school</span>. 她说她放学后一直在听收音机。</p><p>2. 过去完成时可以表示一个动作已经结束，但其结果仍然影响到过去的某一时刻。例如：</p><p><span word="It">It</span> <span word="had">had</span> <span word="been">been</span> <span word="raining">raining</span> <span word="and">and</span> <span word="the">the</span> <span word="street">street</span> <span word="was">was</span> <span word="still">still</span> <span word="wet">wet</span>. 天一直在下雨，街道仍然很湿。</p><p>3. 像 <span word="work">work</span>、<span word="study">study</span>、<span word="stay">stay</span>、<span word="sing">sing</span>、<span word="teach">teach</span>等延续性动词与表示一段时间的时间状语连用时，用过去完成进行时可以表示一个动作一直延续到过去某一时刻，通常强调动作的持续性和不间断性。例如：</p><p><span word="She">She</span> <span word="had">had</span> <span word="been">been</span> <span word="studying">studying</span> <span word="for">for</span> <span word="two">two</span> <span word="hours">hours</span> <span word="when">when</span> <span word="her">her</span> <span word="classmate">classmate</span> <span word="came">came</span> <span word="to">to</span> <span word="visit">visit</span> <span word="her">her</span>. 当她的同学来看她的时候，她学习有两个小时了。</p><p>4. 过去完成进行时与过去进行时的区别。过去进行时主要表示过去某时的一个动作正在进行。例如：</p>
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