在复合句中，修饰主句或主句谓语的句子叫作状语从句。状语从句可位于主句之前，也可位于主句之后。状语从句可分为时间、地点、原因、结果、条件、方式、让步、比较和目的等九大类。
一、状语从句引导词列表
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从句类型
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从属连词
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时间状语从句
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as, after, before, once, since, till, until, when, whenever, while, as soon as
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地点状语从句
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where, wherever, anywhere, everywhere
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原因状语从句
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because, since, as, now (that), seeing that, considering that, in that
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结果状语从句
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that, so that, so/such ...that ...
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目的状语从句
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so that, in order that, for fear that, in case, for the purpose that
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条件状语从句
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if, unless, as/so long as, on condition that, in case, provided that
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比较状语从句
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than, as ...as, not so/as ...as
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方式状语从句
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as, as if/though, how
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让步状语从句
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though, although, even if/though, however, whatever, as, while
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