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2020考研英语：长难句之状语从句句型结构篇
一、理论常识
状语从句，属于副词性从句，简单说就是从句在句子中担任状语，分为时间、目的、地点、条件、方式、让步、比较、结果、原因9种状语从句。
时间引导词：
when , after , before , while , until , till , since , as soon as , everytime , the moment等
地点引导词：where , wherever等
原因引导词：because , since=now that , as等
条件引导词：
if , whether , unless , as long as ,on condition that , providing that等
结果引导词：so / such ... that , so等
目的引导词：in order that , so that等
让步引导词：
though , although , however , whatever=no matter what even if , even though , as (倒装) 等
方式引导词：as , as if等
比较引导词:
than , as ... as , the more ... , the more ... 等
二、试题举例
例句1：
While formal learning is transmitted by teachers selected to perform this role , informal learning is acquired as a natural part of a child's development .
【重点词汇解析】transmit，vt. 传输、传播 vi. 传输、发射信号(in)formal，adj. (非)正式的
【参考翻译】尽管正式的学习过程是由挑选出来担当此角色的教师来进行的，非正式的学习过程却是作为孩子成长的自然一部分而完成的。
例句2：
While it is true that this competition may induce efforts to expand territory at the expense of others , and thus lead to conflict , it cannot be said that war-like conflict among other nations is inevitable , although competition is .
【重点词汇解析】territory，n. 领土、版图expense，n. 代...