那么我们开始今天的课程吧
1.本节课我们进行讲解83课【After the elections 选举】。
2.首先我们跟着外教课文演绎学习。
3.我们要知道的语法重点，【主语＋be可省略】【 Though a little suspicious this time, the policeman gave him the same answer.】这是一个让步状语从句。如果从句的主语和主句的相同而谓语带系动词be，则主语＋be可省略；但原因状语从句的省略形式要带分词 being: 【If possible, please let me know by this evening.】【Being worried about his child, he walked up and down in the room.】
4.然后【主语＋be可省略】【Mary often helped her classmates when（she was）free.（was是系动词）】【While （you were） walking the dog, you were careless（were是进行时的助动词）】【 John won＇t come to your party unless （he is invited.（s是被动语态的助动词）】。
5.我们看【主语be可省略】1.时间状语从句中，省略 主语＋be：【When （she was） very young, she began to learn to play the violin.】她很小的时候，就开始学习小提琴。【Tom likes to listen to musie whille （he is） reading.汤姆喜欢读书时听音乐
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