(Go for it)版九年级Unit 12 Life is full of the unexpectedSection A-2-课件.ppt

;Unit 12 Life is full of the unexpected.;Review;I am waken up by the clock.;Finally, I decide to get up !;Next, I have breakfast, feeling better.;I come to the bus station and wait for the school bus.;Grammar Focus;一、概念 过去完成时表示一个动作或状态在过去某一 时间或动作之前已经完成或结束，也可能是 早已完成或结束，即“过去的过去”；也可以 指过去的动作延续到过去的某个时刻。 二、结构 “had +动词的过去分词”;三、用法 ;2. 过去完成时还可表示过去某一时刻之前发生 的动作或状态持续到过去某个时间或持续下去， 常与for, since等词连用。 例： When Jack arrived, Mary had been away for almost an hour. 当杰克到时，玛丽已经离开快一个小时了。 ;【实战演练】;by the time 的用法;例：By the time you came back, I had finished this book. 你回来时我已经把这本书看完了。 （从句谓语动词came back 为一般过去 时，所以主句动作用过去完成时had finished, 表示过去的过去。）;2. 如果从句中的谓语动词为一般现在时或现在完成时，那么从句中的谓语动词常用将来完成时，表示“截止到将来的某一时刻为止，主句动作将已完成。” 例：By the time I get home, they will have left. 我到家时他们将已经离开。 By the time I graduate next year, I will have lived here for five years. 到明年毕 业时，我将已经在这待了五年了。;（1） by the end of +时间点意为“到……结束时” ① +过去的时间点，主句用过去完成时； 例：By the end of last year, I had stayed in Xi’an for seven years. 到去年结束时，我 已经在西安待了7年了。 ② +将来的时间点， 主句用将来完成时； ;例：By the end of next month, I will have finished my new book. 到下个月结束时我 将要完成我的新书。 (2) by+时间点意为“到……为止；截止……时” ① +现在的时间点，主句用现在完成时； 例：By now, I have finished all my homework. 截止现在，我已经完成了所有的作业。; ② +过去的时间点，主句用过去完成时； 例：By yesterday, the building had been completed. 截止昨天，这个建筑就已经完成了。 ③ +将来???时间点，主句用将来完成时。 例：By tomorrow, all the students will have been out of the school. 到明天所有的学生 都将离校。;1. Tim went into the bathroom. Mary got up. ____________________________________________________________________________ 2. The co?ee became cold. I put cream in the co?ee. ____________________________________________________________________________ ;The teacher collected the math homework. I got to school. ________________________________________ __________________