下半年大学英语六级考试语法及词汇精选（9）
<p> 从句分为定语从句、状语从句、名词性从句。其中定语从句又可以分为限制性定语从句及非限制性定语从句。在复习从句的时候要注意它们的引导词以及限制条件。</p><p> 1 、在非限制性定语从句中 <span word="which">which</span> 可以作主 语， <span word="as">as</span> 则一般不用作主语;</p><p> 2 、在状语从句中用来表示一就的习惯搭配有 <span word="hardly">hardly</span> / <span word="scarely">scarely</span> ...， <span word="no">no</span> <span word="sooner">sooner</span><span word="than">than</span> ;</p><p> 3 、可以引导原因状语从句的符合连词有 <span word="in">in</span> <span word="that">that</span> ， <span word="now">now</span> <span word="that">that</span> 。 <span word="seeing">seeing</span> <span word="that">that</span> ， <span word="considering">considering</span> <span word="that">that</span> </p><p> 4 、在名词性从句中应该注意 <span word="whether">whether</span> 和 <span word="if">if</span> 的区别。 <span word="Whether">Whether</span> 引导的从句可以放在句首，而 <span word="if">if</span> 则不行; <span word="if">if</span> 引导的从句可以有否定的形式，而 <span word="whether">whether</span> 从句就不行; <span word="whether">whether</span> 和 <span word="or">or</span> <span word="not">not</span> 可以连起来用，但 <span word="if">if</span> 和 0<span word="r">r</span> <span word="not">not</span> 就不能连用， <span word="or">or</span> <span word="not">not</span> 必须放在句末。</p><p> 看一道例题：</p><p> <span word="And">And</span> _______<span word="fifty">fifty</span> <span word="years">years</span> <span word="ago">ago</span> <span word="being">being</span> <span word="employed">employed</span> <span word="meant">meant</span> <span word="working">working</span> <span word="as">as</span> <span word="a">a</span> <span word="factory">factory</span> <span word="labour">labour</span> <span word="or">or</span> <span word="as">as</span> <span word="a">a</span> <span word="farmhand">farmhand</span> ， <span word="the">the</span> <span word="employee">employee</span> <span word="of">of</span> <span word="today">today</span> <span word="is">is</span> <span word="increasingly">increasingly</span> <span word="a">a</span> <span word="middle">middle</span> <span word="class">class</span> <span word="person">person</span> <span word="with">with</span> <span word="a">a</span> <span word="substantial">substantial</span> <span word="formal">formal</span> <span word="education">education</span> ， <span word="holding">holding</span> <span word="a">a</span> <span word="professional">professional</span> <span word="or">or</span> <span word="management">management</span> <span word="job">job</span> <span word="requiring">requiring</span> <span word="intellectual">intellectual</span> <span word="and">and</span> <span word="technical">technical</span> <span word="skills">skills</span> .</p><p> <span word="A">A</span> . <span word="when">when</span> <span word="B">B</span> . <span word="which">which</span> <span word="C">C</span> . <span word="as">as</span> <span word="D">D</span> . <span word="that">that</span></p><p> 抛开前面的从句先不看，后面主句的意思是今天雇员越来越多地成为中产阶级，受过扎实的正规教育，担任需要智力和技能的专业工作或管理工作。从句的意思是 50 年前，被雇佣就意味着在工厂或农场里当劳力。显然前后句所表达的并非同一个概念，空格中应该填入表示让步的连词，引导从句。 <span word="when">when</span> 在这里的用法比较特殊，它可以代替 <span word="although">although</span> ，所以正确答案是 <span word="A">A</span> 。又如： <span word="You">You</span> <span word="describe">describe</span> <span word="the">the</span> <span word="boy">boy</span> <span word="as">as</span> <span word="stupid">stupid</span> ， <span word="when">when</span> <span word="in">in</span> <span word="fact">fact</span> <span word="he">he</span> <span word="is">is</span> <span word="very">very</span> <span word="smart">smart</span> .你把那个男孩说得很笨，但是实际上他非常聪明。</p>
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