高中英语语法详解：现在完成时VS一般过去时
<p>一般过去时和现在完成时所表示的动作都发生在过去,那么这两种时态有什么区别呢?</p><p>①一般过去时与具体的表示过去时间状语如：<span word="yesterday">yesterday</span>连用;强调动作在过去发生,与现在无关.</p><p>②现在完成时与自已的特征词连用,强调过去发生的动作对现在的影响或过去开始发生一直持续到现在的动作.</p><p>例：<span word="He">He</span> <span word="saw">saw</span> <span word="the">the</span> <span word="film">film</span> <span word="last">last</span> <span word="night">night</span>. (过去时,表示他昨晚看过那部电影了,现在不知还要不要再看一次)</p><p><span word="He">He</span> <span word="has">has</span> (<span word="ever">ever</span>) <span word="seen">seen</span> <span word="the">the</span> <span word="film">film</span> <span word="before">before</span>.(现在完成时,表时他已看过那部电影,现在不想再看了)</p><p>用于现在完成时的句型</p><p>1)<span word="It">It</span> <span word="is">is</span> <span word="the">the</span> <span word="first">first</span> / <span word="second">second</span> <span word="time">time</span>…. <span word="that">that</span>…结构中的从句部分,用现在完成时.</p><p><span word="It">It</span> <span word="is">is</span> <span word="the">the</span> <span word="first">first</span> <span word="time">time</span> <span word="that">that</span> <span word="I">I</span> <span word="have">have</span> <span word="visited">visited</span> <span word="the">the</span> <span word="city">city</span>.</p><p><span word="It">It</span> <span word="was">was</span> <span word="the">the</span> <span word="third">third</span> <span word="time">time</span> <span word="that">that</span> <span word="the">the</span> <span word="boy">boy</span> <span word="had">had</span> <span word="been">been</span> <span word="late">late</span>.</p><p>2)<span word="This">This</span> <span word="is">is</span> <span word="the">the</span>… <span word="that">that</span>…结构,<span word="that">that</span> 从句要用现在完成时.</p><p><span word="This">This</span> <span word="is">is</span> <span word="the">the</span> <span word="best">best</span> <span word="film">film</span> <span word="that">that</span> <span word="I">I</span>'<span word="ve">ve</span> (<span word="ever">ever</span>) <span word="seen">seen</span>.这是我看过的最好的电影.</p><p><span word="This">This</span> <span word="is">is</span> <span word="the">the</span> <span word="first">first</span> <span word="time">time</span> (<span word="that">that</span>) <span word="I">I</span>'<span word="ve">ve</span> <span word="heard">heard</span> <span word="him">him</span> <span word="sing">sing</span>. 这是我第一次听他唱歌.</p><p>1.现在完成时不能单独与准确时间状语连用，(如表示过去的时间状语)如<span word="yesterday">yesterday</span>(<span word="morning">morning</span>、<span word="afternoon">afternoon</span>),<span word="last">last</span>(<span word="morning">morning</span>、<span word="afternoon">afternoon</span>)等，除非与<span word="for">for</span>,<span word="since">since</span>连用.</p><p>2.现在完成时往往同表示不确定的过去时间状语连用如<span word="already">already</span>(肯定句中)，<span word="yet">yet</span>(否定，疑问，句末)，<span word="just">just</span>,<span word="before">before</span>,<span word="recently">recently</span>,<span word="still">still</span>,<span word="lately">lately</span>,<span word="never">never</span>等</p>
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