Unit12+Section+A+Grammar+Focus-4c+课件人教版九年级英语全册.pptxVIP

Unit 12 Life is full of the unexpectedSection A Grammar focus -4cLearning aims1.Learn about past perfect tense.2.Review of key structures.3.能正确使用由when,before,as,by the time 引导的时间状语从句表示过去发生的事情，复习一般过去时态。Grammar FocusWhen I got to school, I realized that I had left my backpack at home.By the time I got to school, the bell had rung.Before I got to the bus stop, the bus had already left.I was about to go up to my office when I decided to get a coffee first.As I was waiting in line with the other office workers, I heard a loud sound. Grammar Focus根据汉语提示完成句子。1)当我到达学校的时候，我才意识到我把书包忘在家里了。 _______ I got to school, I realized that I ______ ______ my backpack at home. 2)到我返回学校的时候，铃声已经响过了。 _____ _____ _____ I got back to school, the bell ______ _______.WhenhadleftBy the time had rungGrammar Focus3)我到达公共汽车站之前， 汽车已经离开了。 Before I _____ _____ the bus stop, the bus ______ _______ _______.4)我决定先买一杯咖啡，然后再去办公室。 I ______ ______ ______ go up to my office when I decided to get a coffee first.5)就在我和别的工作人员一起排队等候的时候，听到了一个巨大的声响。 As I ______ _______ ______ ______ with other officeworkers, I______ _____ _____ ______.got to hadalready left was about towas waiting in line heard a loud soundThe teacher started teaching in the classroom. She got into the classroom.8:20 A.M8:22 A.M.presentgot into the classroomWhen she ____________________, the teacher ___________________ in it.had started teachingpresent The concert was over. Liu Mei woke up. By the time / When Liu Mei _________, the concert _____________.woke uphad been overPast perfect tense含义：基本结构：表示在过去某一时间或动作之前已经发生或完成了的动作。助动词had+V-ed用 法1. 用于表示过去某一时刻或某一动作前已经发生的动作或状态，常与by, before, until, when等引导的表过去的时间状语连用。1) By the time I got to the airport, my flight had already taken off.2) The movie had started before I arrived at the cinema.3) He waited until she had finished speaking.4) When we got there, the boys had started playing football.2. 过去完成时用于宾语从句中，表示从句的动作或状态发生在主句的谓语动作之前。1) She said she h