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考点:状语从句的省略与分词转换

外研版必修第三册 Unit 6 重点语法。


一、省略条件

在时间、条件、让步状语从句中,当满足以下两点时,可以省略“主语 + be 动词”:

  1. 从句主语与主句主语一致(或从句主语为 it);
  2. 从句谓语含有 be 动词

二、经典省略句式

  • When (he was) asked, he shook his head. $ o$ When asked, he shook his head.
  • If (it is) possible, please reply soon. $ o$ If possible, please reply soon.
  • Unless (you are) invited, don't enter. $ o$ Unless invited, don't enter.

高中英语语法知识库与高考复习指南