2017届广东省广州市天河中学高考英语语法一轮复习基础知识点精讲：动词时态04（含答案）
<p> 4．现在完成时和一般过去时的区别 ①两者都可表示过去发生过的动作，但前者表示的是过去的动作对现在的影响，而后者则只是表示过去有这一动作的事实。 <span word="He">He</span> <span word="locked">locked</span> <span word="the">the</span> <span word="door">door</span>.他锁过门。（但现在门是开是锁不清楚。） <span word="He">He</span> <span word="has">has</span> <span word="locked">locked</span> <span word="the">the</span> <span word="door">door</span>.他把门锁上了。（现在门是锁着的。） <span word="Who">Who</span> <span word="turned">turned</span> <span word="on">on</span> <span word="the">the</span> <span word="light">light</span>?谁开的灯？（着眼开灯的动作，不管现在灯是开是关。） <span word="Who">Who</span> <span word="has">has</span> <span word="turned">turned</span> <span word="on">on</span> <span word="the">the</span> <span word="light">light</span>?谁把灯打开了？（着眼开灯的结果，即现在灯还亮着。） ②两者都可表示过去开始并延续了一段时间的动作，现在完成时表示该动作仍在继续，而一般过去时则说明该动作现已终止。 <span word="He">He</span> <span word="has">has</span> <span word="lived">lived</span> <span word="in">in</span> <span word="Beijing">Beijing</span> <span word="for">for</span> <span word="four">four</span> <span word="years">years</span>.他在北京住了四年了。（现在仍住那儿） <span word="He">He</span> <span word="lived">lived</span> <span word="in">in</span> <span word="Beijing">Beijing</span> <span word="for">for</span> <span word="four">four</span> <span word="years">years</span>.他曾在北京住了四年。（现在不住那儿了）</p><p> <span word="B">B</span>．过去完成时 过去完成时的动作须在过去某一时间之前发生，即发生在“过去的过去”。</p><p> 1．过去完成时的构成过去完成时是由“<span word="had">had</span>+过去分词”构成的。 <span word="Soon">Soon</span> <span word="I">I</span> <span word="realized">realized</span> <span word="I">I</span> <span word="had">had</span> <span word="made">made</span> <span word="a">a</span> <span word="serious">serious</span> <span word="mistake">mistake</span>. 我很快就意识到我犯了一个严重的错误。 <span word="The">The</span> <span word="man">man</span> <span word="sitting">sitting</span> <span word="beside">beside</span> <span word="me">me</span> <span word="on">on</span> <span word="the">the</span> <span word="plane">plane</span> <span word="was">was</span> <span word="very">very</span> <span word="nervous">nervous</span>. <span word="He">He</span> <span word="had">had</span> <span word="not">not</span> <span word="flown">flown</span> <span word="before">before</span>. 飞机上坐在我旁边的人很紧张，他以前从没乘过飞机。 <span word="Had">Had</span> <span word="he">he</span> <span word="gone">gone</span> <span word="home">home</span> <span word="when">when</span> <span word="you">you</span> <span word="arrived">arrived</span>? 你到的时候他已经回家了吗？</p>
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