状语从句知识点总结：原因状语从句学习指导
<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>原因状语从句就是在复合句中表示主句动作发生原因的状语从句。用于引导原因状语从句最常用的连词是<span word="because">because</span>，另外还有<span word="as">as</span>, <span word="since">since</span>以及<span word="now">now</span> <span word="that">that</span>等。</p><p>1. 用<span word="because">because</span>引导：<span word="because">because</span>是引导原因状语从句最常用的连词，其意为因为。如：</p><p><span word="The">The</span> <span word="little">little</span> <span word="boy">boy</span> <span word="was">was</span> <span word="crying">crying</span> <span word="because">because</span> <span word="he">he</span> <span word="was">was</span> <span word="lost">lost</span>.</p><p>那小孩因迷路而哭。</p><p><span word="I">I</span> <span word="bought">bought</span> <span word="the">the</span> <span word="house">house</span> <span word="simply">simply</span> <span word="because">because</span> <span word="it">it</span> <span word="was">was</span> <span word="large">large</span>.</p><p>就是因为这所房子大我才买的。</p><p>2. 用<span word="as">as</span>引导：<span word="as">as</span>也可以用于引导原因状语从句，意思是由于。如：</p><p><span word="As">As</span> <span word="he">he</span> <span word="is">is</span> <span word="ill">ill</span>, <span word="he">he</span> <span word="cant">cant</span> <span word="come">come</span> <span word="to">to</span> <span word="the">the</span> <span word="meeting">meeting</span>.</p><p>由于生病了，他不能来参加会议。</p><p><span word="As">As</span> <span word="you">you</span> <span word="werent">werent</span> <span word="there">there</span>, <span word="I">I</span> <span word="left">left</span> <span word="a">a</span> <span word="message">message</span>.</p><p>由于你不在那儿，我留了个信儿。</p><p>3. 用<span word="since">since</span>引导：<span word="since">since</span>引导原因状语从句时，意思是既然。如：</p><p><span word="Since">Since</span> <span word="you">you</span> <span word="ask">ask</span>, <span word="I">I</span> <span word="will">will</span> <span word="tell">tell</span> <span word="you">you</span>.</p><p>你既然问，我就告诉你。</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>.</p><p>既然你去，我也去。</p>
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