状语从句知识点总结：状语从句在复合句中的位置
<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>一般说来，状语从句在复合句中的位置比较灵活，有时置于句首，有时置于句末，有时置于句首与句末都可以。如：</p><p><span word="While">While</span> <span word="I">I</span> <span word="was">was</span> <span word="working">working</span> <span word="in">in</span> <span word="the">the</span> <span word="garden">garden</span>, <span word="my">my</span> <span word="wife">wife</span> <span word="was">was</span> <span word="cooking">cooking</span> <span word="dinner">dinner</span>.</p><p>我在园子里干活时，我妻子正在做饭。</p><p><span word="Wait">Wait</span> <span word="until">until</span> <span word="the">the</span> <span word="children">children</span> <span word="settle">settle</span> <span word="down">down</span> <span word="before">before</span> <span word="you">you</span> <span word="start">start</span> <span word="the">the</span> <span word="lesson">lesson</span>.</p><p>等学生都静下心来再开始上课。</p><p>当状语从句置于句首时，其后通常会用逗号隔开。但当句子较短或当状语从句与主句的关系比较密切时，也可以不用逗号。如：</p><p><span word="If">If</span> <span word="you">you</span> <span word="pull">pull</span> <span word="too">too</span> <span word="hard">hard</span> <span word="you">you</span> <span word="will">will</span> <span word="break">break</span> <span word="the">the</span> <span word="rope">rope</span>.</p><p>如果太用力拉，就会把绳子拉断。</p><p><span word="When">When</span> <span word="he">he</span> <span word="smiled">smiled</span> <span word="he">he</span> <span word="exposed">exposed</span> <span word="a">a</span> <span word="set">set</span> <span word="of">of</span> <span word="perfect">perfect</span> <span word="white">white</span> <span word="teeth">teeth</span>.</p><p>他笑时露出了一口漂亮的白牙。</p><p>当状语从句位于句末时，其前一般不用逗号。但是，如果状语从句与其前主句的关系不是很密切，尤其作为添补内容时，其前也可用逗号，如：</p><p><span word="Better">Better</span> <span word="say">say</span> <span word="yes">yes</span>, <span word="if">if</span> <span word="they">they</span> <span word="ask">ask</span> <span word="you">you</span>.</p><p>如果他们问你，你最好说是。</p>
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