what的某些特殊的用法
<p><span word="what">what</span>在英语中是个很常用的词。我们知道它能用作疑问词，引导特殊疑问句，在句中做主语﹑表语或宾语;又能用作连接代词(或复合关系代词)，引导主语从句﹑表语从句或宾语从句;还能用作疑问形容词，只作定语并可表示感叹。对于这些常规的用法本文就不一一赘述，现就<span word="what">what</span>在高中英语中的某些特殊用法归纳如下：</p><p>1. <span word="what">what</span> = <span word="just">just</span> <span word="as">as</span>，意为恰像，犹如，好比用作连词，引导比较状语从句。</p><p>⑴ 惯用句式是：<span word="A">A</span> <span word="is">is</span> <span word="to">to</span> <span word="B">B</span> <span word="what">what</span> <span word="C">C</span> <span word="is">is</span> <span word="to">to</span> <span word="D">D</span>. 意为<span word="A">A</span>对<span word="B">B</span>而言正如<span word="C">C</span>对<span word="D">D</span>一样例如：</p><p>① <span word="Air">Air</span> <span word="is">is</span> <span word="to">to</span> <span word="us">us</span> <span word="What">What</span> <span word="water">water</span> <span word="is">is</span> <span word="to">to</span> <span word="fish">fish</span>. 空气对于我们犹如水对于鱼。(介词<span word="to">to</span> 表示两者的关系)</p><p>⑵ 也有<span word="A">A</span> <span word="is">is</span> <span word="for">for</span> <span word="B">B</span> <span word="what">what</span> <span word="C">C</span> <span word="is">is</span> <span word="for">for</span> <span word="D">D</span>.句式。例如：</p><p>② <span word="Poultry">Poultry</span> <span word="is">is</span> <span word="for">for</span> <span word="the">the</span> <span word="cook">cook</span> <span word="what">what</span> <span word="canvas">canvas</span> <span word="is">is</span> <span word="for">for</span> <span word="the">the</span> <span word="paint">paint</span>. 厨师离不了家禽正如画家离不开画布一样。(介词<span word="for">for</span>表示供使用)</p><p>⑶ <span word="what">what</span> 引导的从句也可以放在句首，其句式是： <span word="What">What</span> <span word="C">C</span> <span word="is">is</span> <span word="to">to</span> <span word="D">D</span>， <span word="that">that</span> <span word="A">A</span> <span word="is">is</span> <span word="to">to</span> <span word="B">B</span>.(= <span word="A">A</span> <span word="is">is</span> <span word="to">to</span> <span word="B">B</span> <span word="what">what</span> <span word="C">C</span> <span word="is">is</span> <span word="to">to</span> <span word="D">D</span>.)</p><p>在这一结构中，喻体在前，主体在后，相当于<span word="just">just</span> <span word="as">as</span>，<span word="so">so</span>结构，意思也是<span word="A">A</span>对<span word="B">B</span>而言正如<span word="C">C</span>对<span word="D">D</span>一样例如：</p><p><span word="What">What</span> <span word="blood">blood</span> <span word="vessel">vessel</span> <span word="is">is</span> <span word="to">to</span> <span word="a">a</span> <span word="mans">mans</span> <span word="body">body</span>， <span word="that">that</span> <span word="railway">railway</span> <span word="is">is</span> <span word="to">to</span> <span word="transportation">transportation</span>.(=<span word="Just">Just</span> <span word="as">as</span> <span word="blood">blood</span> <span word="vessel">vessel</span> <span word="is">is</span> <span word="to">to</span> <span word="a">a</span> <span word="mans">mans</span> <span word="body">body</span> ，<span word="so">so</span> <span word="Railway">Railway</span> <span word="is">is</span> <span word="to">to</span> <span word="transportation">transportation</span>.)</p>
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