高三英语一轮复习---状语从句的省略 （无答案）

状语从句的省略 一：状语从句中的省略省略句的规则 1. 当从句的主语和主句的主语一致(或者从句的主语为it)． 2. 从句谓语中包含be动词．如：be doing,be done, be to do, be +adj 在此种情况下可以省去从句的主语和be动词．保留be之后的部分，被保留部分常为现在分词、过去分词、不定式、形容词等。 1. Don’t speak until（you are）spoken to . 2. I’ll buy a TV set if （it is ）necessary. 3. While（ I was ）walking walking alone in the street, I heard my name called. 4.Tom raised his hand as if (he was ) to say something. 二：常见的几种状语从句的省略 1. when，while，as, until引导的时间状语从句的省略 while(they are)visiting the city．they reeeived a warm welcom when(he was)asked why he was late，he kept silent． ●注意After finishing his homework,he went home happily. Before being repaired, the TV set needs a careful examination. 2. if，unless，once引导的条件状语从句的省略 Onee(it is)begun．it must be done well． Unless（you are invi