Quails typically have short rounded wings that enable them to spring into f
问题描述：
Quails typically have short rounded wings that enable them to spring into f
quails typically have short rounded wings that enable them to spring into full flight instantly when disturbed in their hiding places.中的“when disturbed”为什么不是"when they are disturbed" 这个用法是什么语法,似乎对理解没问题,但是感觉总缺点什么成分!
答
状语从句与主句的主语相同,且谓语部分有be的话,可把从句的主语和be一起省略能不能再举个例子，是不是所有的遇到这种情况都可以省略~?Professor Wang ill，the lecture was put off． Her money stolen，she couldn't buy a plane ticket for her home．