状语从句知识点总结：学习原因状语从句的几点注意
<p>【导语】英语语法让很多学生都头疼，因为复杂难懂的句式和词组有时难以记忆。英语网为大家整理了英语语法大全，希望对同学们的英语语法学习有所帮助。更多内容尽在英语网。</p><p>1. 引导原因状语从句的从属连词主要有<span word="because">because</span>, <span word="as">as</span>, <span word="since">since</span>, <span word="seeing">seeing</span> (<span word="that">that</span>), <span word="now">now</span> (<span word="that">that</span>)等：</p><p><span word="They">They</span> <span word="cant">cant</span> <span word="have">have</span> <span word="gone">gone</span> <span word="out">out</span> <span word="because">because</span> <span word="the">the</span> <span word="lights">lights</span> <span word="on">on</span>. 他们不可能出去了，因为灯还亮着。</p><p><span word="Since">Since</span> <span word="you">you</span> <span word="are">are</span> <span word="going">going</span>, <span word="I">I</span> <span word="will">will</span> <span word="go">go</span>. 既然你去，我也去。</p><p><span word="Now">Now</span> <span word="that">that</span> <span word="we">we</span> <span word="are">are</span> <span word="alone">alone</span>, <span word="we">we</span> <span word="can">can</span> <span word="speak">speak</span> <span word="freely">freely</span>. 现在我们单独在一起，可以随便谈了。</p><p>2. 除以上提到的大家比较熟悉的引导原因状语从句的从属连词外，<span word="when">when</span>有时也可引导原因状语从句，其意既然。如：</p><p><span word="I">I</span> <span word="cant">cant</span> <span word="tell">tell</span> <span word="you">you</span> <span word="when">when</span> <span word="you">you</span> <span word="wont">wont</span> <span word="listen">listen</span>. 既然你不想听，我就不告诉你了。</p><p>3. 有关原因状语从句还应注意以下几点：</p><p>(1) <span word="as">as</span> 与 <span word="since">since</span>, <span word="now">now</span> <span word="that">that</span> 一样表示双方都知道的原因，通常位于主句前，且均不可用于强调结构被强调。</p><p>(2) 当表示直接的因果关系，回答 <span word="why">why</span> 时，或有 <span word="only">only</span>, <span word="just">just</span>, <span word="all">all</span>, <span word="partly">partly</span>, <span word="not">not</span>, <span word="but">but</span> 等副词修饰时，或用在强调结构中都只能用 <span word="because">because</span>。</p><p>(3) <span word="for">for</span> 有时也可引出表示原因的分句，但它只能位于后面，对前一分句加以解释或推断。</p>
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