九年级英语课件unit.ppt

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1、Unit12 Life is full of the unexpected 6:00 7:00 6:00 7:00 现在现在 By the time I got up,my sister had already washed all the clothes.I got to schoolnow8:158:00 amThe teacher came into the classroomBy the time I got to school,the teacher had come into the classroom.By the time she got outside,the bus had

2、 already left.她出去的时候她出去的时候,公共汽车已经开走了公共汽车已经开走了.by the time 意思是意思是“到到的时候的时候”,相当于相当于 when,后接过去时的句子后接过去时的句子时时,主语的谓语动词用过去完成时态主语的谓语动词用过去完成时态.过去完成时态的用法：1、表示过去的过去，通常由、表示过去的过去，通常由by引导的短语做时间状引导的短语做时间状语或者由语或者由by/when/before引导的从句做时间状引导的从句做时间状语从句语从句 By the end of last year,I had learned about one thousand Englis

3、h words.By the time he was twenty,he had won about ten medals.When I got there,they had already left.They had already had breakfast before they arrived at the hotel.He said that he had never seen such a beautiful bird before.2、常用在宾语从句中、常用在宾语从句中 He told me he had already finished his homework.I reali

4、zed he had fooled me again.3、体现在上下文中、体现在上下文中 I didnt go to the movies yesterday because I had seen it twice.四、过去完成时与现在完成时的区别四、过去完成时与现在完成时的区别 现在完成时表示的动作发生在现在完成时表示的动作发生在过去，但侧重对现在产生的结果或过去，但侧重对现在产生的结果或造成的影响，与现在有关，其结构造成的影响，与现在有关，其结构为为“助动词助动词 have(has)+have(has)+过去分过去分词词”；过去完成时则是一个相对的；过去完成时则是一个相对的时态，它所表示的

5、动作不仅发生在时态，它所表示的动作不仅发生在过去，更强调过去，更强调“过去的过去过去的过去”，只，只有和过去某时或某动作相比较时，有和过去某时或某动作相比较时，才用到它。才用到它。本课出现的主要动词的过去式和过去分词本课出现的主要动词的过去式和过去分词ring rang rungget got gottengo went goneleave left leftstart started startedbe was/were beentake took takenrun ran runwake woke wokenWhat do you usually do in the morning bef

6、ore school?brush my teethWhat do you usually do in the morning before school?take a showerWhat do you usually do in the morning before school?have breakfastMary_ up late.By the time she got up,her brother _ already _ in the shower.By the time she got outside,the bus _ already _.She _ all the way to

7、school.gothadhadgottenleftranMarys morning When she got to school,she realized that she had left her backpack at home.关于关于get的词组小结的词组小结get to school 到学校get into the shower 去洗澡get outside 到外边get home 到家get up 起床get married 结婚get dressed 穿好衣服get to class 到班级get bored 变得无聊get tired 变得疲劳1.We _(learn)two

8、 thousands words by the 1.We _(learn)two thousands words by the end of last year.end of last year.3.When we _(arrive)at the station,they 3.When we _(arrive)at the station,they _(wait)for more than twenty minutes._(wait)for more than twenty minutes.had learnedarrivedhad waited2.I _him when I was a student.2.I _him when I was a student.had known4.One of the men couldnt move,because he _ 4.One of the men couldnt move,because he _ (break)his legs.(break)his legs.had broken