状语从句

常见的英语语法知识点之状语从句思维导图，包括：时间状语从句、条件状语从句、让步状语从句、结果状语从句、原因状语从句、目的状语从句、地点状语从句、方式状语从句、比较状语从句。

状语从句

• 概念：作次要（状语成分）成分，所处位置不固定，从句主要成分完整
• 类型
  • 时间状语从句
    • 常用引导词/短语：when , while , as , as soon as (一......就) , since (自从) , hardly/scarely.......when (一.....就) ，no sooner .... than... (一....就)
    • 考点
      • 1.when/while 的区别
        • when + 短暂性V
        • while+延续性V(be doing )
      • 2.完成态用法
        • a. since (自从) ，sb + have/has done+ since +sb+did.
        • b.How long+完成时
      • 3.when 作为时间状语从句引导词，注意主将从现
        • eg:When I arrive , I will call you.
  • 条件状语从句
    • 常用引导词/短语: if~ on condition that (假如；条件是) , unless= if not (除非) , in case that (以防/免...) ，only if (只要....就....)
    • 主将从现
    • 注意：if 用法
      • 1.能实现的、真的：用法为主将从现
      • 2.假的：用法为虚拟语气
  • 让步状语从句
    • 常用引导词/短语：though , although , even if/though (即使) , as (虽然、然而) , while (通常位于句首，译为虽然、然而) , however（然而、可是、不过；无论如何、不管怎样；究竟怎样）~no matter how (无论如何)
    • though, as 部分倒装
      • 句型：adj/n/v+though/as+主语+谓语(助动词、系动词)
      • eg
        • 1. Young as he is , he knows everything.
        • 2. Child as he is , he knows everything.
        • 3. Try hard as he will , he may fail.
      • 注意：倒装部分为n时，必须省略冠词
    • whatever/however =no matter what/how (无论......)
      • eg:Whatever you do , I love you !
  • 结果状语从句
    • 常用引导词/短语: so/such.....that....... (如此以至于)
    • so/such.....that...... 的区别
      • 1.so +adj+that
        • eg:The weather is so cold that I don't want to go out.
      • 2.such+冠词+n+that
        • eg:It is such a cold weather that I don't want to go out.
  • 原因状语从句
    • 常用引导词：because=since=as=for,due to=owing to=seeing that=now that=in that (由于、因为) , becase of
    • 注意事项
      • a. because/since/as/for+句子
      • b. because of=due to=owing to 等后接n/v-ing
  • 目的状语从句
    • 常用引导词/短语: so that (为了) ,in order that (为了、以便于、以免) , in case (以免) ，for fear that (唯恐) , lest (以防、唯恐...) , in order to do , so as to do (为了) ，to the end that (为...起见)
    • in order that/ in order to do=so as to do 的区别
      • a. in order that+句子
      • b. in order to do , so as to do
    • for fear that , in case , lest 用于虚拟语气
  • 地点状语从句
    • 常用引导词:where , wherever .....
  • 方式状语从句
    • 常用引导词/短语：as if/though(好像、正如) , the way
    • as if/though 的虚拟语气
      • eg: He talked as if/though he had been to USA.
  • 比较状语从句
    • 引导词: as+adj+as:和.....一样 adj比较级+than.... ：比....更少 less+adj原级+than.... : ....少于 the +adj比较级 , the +adj比较级 ：越.... ，就越...... adj比较级 and adj比较级 ：越来越
• 注意：no matter +wh--(where/when/why)句式只能用于状语从句
• 浮动主题