《极限突破》2011年九年级英语全册 Unit 10Section A配套课件 人教新目标版

1、Unit 10,By the time I got outside，,the bus had already left. Section A,1 When I got to school, I realized I had left my backpack at home. 我到学校时才意识到把书包落在家了。,【用法归纳】,(1)I had left my backpack at home 是一个过去完成时的句子，,表示在过去某一时间或某一动作之前完成的动作或存在的状态。 如：,By three oclock yesterday afternoon we had finished the wo

2、rk.,到昨天下午三点，我们已经完成了工作。,(2)left 是 leave 的过去式，在此处意为“遗忘；忘记”。如： Li Ming left his dictionary in the reading-room yesterday.昨天,李明把词典忘在阅览室里了。,【妙辨异同】 leave 与 forget,leave 作“遗忘”讲时，后面常跟地点状语；forget 意为“遗,忘；忘记”时，后面不接地点状语。如：,I left my schoolbag at your home. 我把书包落在你家里了。,I forgot to bring the book.我忘记拿书了。,【针对训练】,W

3、hen I got home, they _ all the doors. Ahad locked Blocked Chave locked Dlock,A,2My alarm clock didnt go off, and by the time I woke up,my father had already gone into the bathroom and I had to wait,for him to come out.我的闹钟坏了，等我醒来的时候，我父亲已 经进去洗澡了，我只好等他出来。,【用法归纳】,(1)go off 意为“发出响声”。如：,The thieves ran a

4、way when the burglar alarm went off.防盗警,报器一响，窃贼立刻逃走了。,(2)by the time 意为“到时候；到之前”，引导时 间状语从句时，从句用一般过去时，主句常用过去完成时。如： By the time he was ten, Tom had built a chemistry lab himself. 等到了十岁的时候，汤姆已经自己建了一个化学实验室。 【针对训练】 By the time we got to the cinema, the film _ for five,minutes. Ahas begun Chas been on,Bha

5、d begun Dhad been on,D,过去完成时,过去完成时表示过去某一时间或某一动作之前发生或完成 的动作，即过去的过去。其结构为：助动词 had (用于各种人称 和数)过去分词。表示过去某一时间之前可用 by, before 等构 成的短语，也可用 when, before 等引导的时间状语从句或者通过 上下文逻辑关系表示。如：,When I got there, they had already started playing football. 当我到那儿时，他们已经开始踢足球了。,【针对训练】 By the time he _ from America, his daughter,_ school.,B,Ahad returned; finished Creturned; finished,Breturned; had finished Dwould return; finished,Did you visit Tom y