重庆市江津第五中学高中英语 Unit 1 Favorite Teachers PeriodⅡ Reading 课堂导学案 新人教版必修 1It’s been a long time since we left our junior middle school. since(conj) 自从，因为(1)接时间点：如 I have stayed in that country since 1995. （要求：谓 v.用现在完成时，而且须是延续性动词。）(2)接一段时间 + ago：如 They have lived in that house since two years ago. （要求：谓 v.用现在完成时，而且须是延续性动词。）(3)接时间状语从句： I have loved her since I met her last time. Lily has stayed at home since she left school. （要求：主句的谓 v.用现在完成时，而且须是延续性动词；从句的谓 v.用一般过去时，而且须是终止性动词。） (4)用于句型“It’s / It has been + 一段时间 + since + 时间状语从句”中，译作“自从…以来, 已经…(时间)了”It’s / has been three months since he moved to this city. It’s / has been three months since he joined the Army. It has been/ is 3 years since I smoked. 我戒烟三年了。It has been/ is 3 years since I joined the army. 我参军三年了。 (5) since 还可引导原因状语从句，译作“由于；因为”，相当于 because。Since he was lazy, he didn’t finish his homework.练习题：1）、— The window is dirty. — I know. It _____ for weeks. A. hasn’t cleaned B. didn’t clean C. wasn’t cleaned D. hasn’t been cleaned2）、Since she left down, her brother ____ clean and cook for the familyA. had to B. need to C. needs to D. has’t 1. I do enjoy the new life here.do/does/did +动词原形 do, does, did 都可以表示强调,意为“的确”。do 用来强调肯定祈使句和主语为第一人称、第二人称、第三人称复数的一般现在时的肯定谓语；does 用来强调主语为第三人称单数1的一般现在是的肯定谓语；did 用来强调一般过去时的肯定谓语。Eg: Do be careful when you cross the street. He did like doing sports 2 years ago. She does get up at 6:00 every day.翻译：Do come tomorrow! ____________________...
