八年级英语what were you doing when the ufo arrived教案

1、 Unit3 What were you doing when the UFO arrived?内容提要 含6大部分：本单元教学目标、知识背景、重点难点分析、词汇讲解、时态等语法突破、语言点19个的讲解。资料贯穿整个单元，方便教师备课、学生学习、复习。一. 本单元教学内容：（一） 语言目标（Language goals）1. Talk about past events . 谈论过去发生的事件。2. Tell a story . 讲述故事。（二）语言结构（Structures）1. 过去进行时态： “was / were + doing”结构2. 以when、while引导的时间状语从句3.

2、复习一般过去时（Past tense）（三）目标语言（Target Language）1. What were you doing when the UFO arrived ? I was sitting in the barbers chair .2. The barber was cutting my hair when they arrived .3. While he was buying souvenirs , a girl called the police .4. The girl was shopping when the alien got out .5. While the

3、 girl was shopping , the alien got out .6. How about you ? I was doing my homework .7. Youre kidding .（四）词汇（Vocabulary）1. 部分动词的过去式took off（起飞、脱下）arrived（到达）landed（着陆）got out（下车、下来）shouted（喊叫）climbed（爬）happened（发生）ran away（逃跑）2. 部分动词的-ing形式cuttingcookingeatinggetting outgoing makingshoutingsleepingst

4、andingstudyingtakingtalkingclimbingbuyingcoming3. when、while 当时候4. bathroom（浴室）barbers（理发店）barber shop 理发店shower（淋浴）police officer（警官）5. another（另一个）jump down（跳下来）go up（向上去）in front of（在前面）（五）重点、难点分析1. 过去进行时：表示在过去某一时间内正在进行的动作。构成：was / were + 现在分词（其中was是am、is的过去式，were是are的过去式）eg. 1) I was doing my ho

5、mework then . 那时，我正在做作业。2) He was cooking in the kitchen at 12 oclock yesterday .昨天12点，他正在厨房烧饭。用法：1）过去进行时表现过去某一时刻正在进行的动作。eg. She was writing a letter when I came in .我进来时，她正在写封信。2）过去进行时还表示过去某阶段正在进行的动作。eg. They were waiting for you yesterday .他们昨天一直在等你。2. 现在分词的构成1）一般动词在词尾加-ing，读i，如gogoing。2）以不发音字母e结尾

6、的动词，先去掉e，再加-ing。comecomingmakemakingwritewriting3）以重读闭音节结尾的动词，如果末尾以一个辅音字母结尾，应先双写这个字母，再加ing，x和w结尾的除外。如getgettingswimswimmingshowshowing4）以字母y结尾的单词，直接加ing。如carrying、playing、5）以字母ie结尾的动词，变ie为y，再加ing。如diedyinglielying6）以元音字母加e结尾，或以e结尾，且e发音的动词，直接加-ing 。如seeseeingbebeing3. 使用进行时态的注意事项1）一些动词，如see、hear、love

7、、like、know、remember；understand、have等表示感情、知觉和状态的词，一般不用于进行时态。2）在there和here引起的句子中，常用一般现在时代替现在进行时。eg. Here comes the bus . There goes the bell .4. 过去进行时和一般过去时的区别1）过去进行时表示过去正在进行的动作，而一般过去时则表示一个完整的动作。如：They were writing letters to their friends last night .昨晚他们在写信给他们的朋友。（没有说明信是否写完）They wrote letters to the

8、ir friends last night .他们昨晚写了信给他们的朋友。（表达了他们已写好的意思，整个写的过程已完成。）2）当动作延续较长时间时或表示厌烦、赞美等感情色彩时，常用过去进行时表示。如：He was thinking more of others than of himself .他考虑别人的比考虑自己的多。（表示说话者赞扬的口气）The boy was always making trouble then .那时，他总是惹麻烦。（表示说话者厌烦的口气）5. 以when和while引导的时间状语从句1）延续性动词和非延续性动词 延续性动词指动作可以延续一段时间，而不是瞬间结束。如

9、：work、study、drink、eat等。非延续性动词指动作极为短暂，瞬间结束。如：start、begin、hit、jump、knock等。2）在本单元中，出现了以when和while引导的时间状语从句。 when表示“当的时候”。从句中既可用延续性动词，又可用非延续性动词，这些动词既可以表示动作，又可表示状态。从句中的动作既可和主句的动作同时发生，又可在主句的动作之前或之后发生。如：Mary was having dinner when I saw her .The boy was still sleeping when his mother got home yesterday mor

10、ning . while表示“在的时候”、“在期间”。它强调主句的动作与从句的动作同时发生或主句的动作发生在从句的动作过程中。while从句中必须是表示动作或状态的延续性动词。如：The weather was fine while we were in Beijing .She called while I was out .如果主句的动作在从句的动作过程中发生，从句常用进行时。如。While we were swimming someone stole our clothes .Dont talk so loud while others are working .总结： when可指时间

11、点，又可指时间段，从句中可用延续性动词，也可用非延续性动词。 while总是指一个时间段，从句中必须用延续性动词。 6. UFO：Unidentified Flying Object 不明飞行物1947年6月24日，一名叫做阿诺德的美国商人，架着一架小型飞机在华盛顿州上空，发现一组巨型不明飞行物以1000公里左右的速度，同他一起在空中翱翔。阿诺德的有关目击报告第一次引起公众的兴趣，从此“飞碟”或UFO便迅速流传开来。7. The boy was walking down the street when a UFO landed .当一个UFO着陆的时候，那个男孩正在街上走。land n. 陆地

12、，地面v. 登陆，降落8. At around ten oclock in the morning .在上午，在早晨 in the morning在下午 in the afternoon在晚上 in the evening在十点钟左右 at around ten oclock在正午 at noon在晚上 at night*请注意介词的不同9. take off（1）脱下 eg. Please take off your coat . Its warm in the room .请脱下大衣，屋子里面很暖和。（2）起飞 eg. The girl was eating the icecream wh

13、en the UFO took off .当UFO起飞的时候，那个女孩正在吃 冰激淋。 10. talk on the phone 通过电话谈话注意：这里要用介词on11. get out of the shower 洗完澡出来get out of the UFO 从UFO中出来get out 出来12. I was walking down the street when a UFO landed right in front of me .当一个UFO恰好落在我面前的时候，我正在街上走。right在这里是副词，“恰好”“正好”的意思，表示强调。例如right now（现在） right h

14、ere（就在这儿）right in front of me 恰好在我前面13. be surprised （某人）很吃惊eg. He was surprised when I saw him .我看见他的时候，他很吃惊。另外，surprise sb. 指“让某人吃惊”eg. I dont want to surprise you .我不想让你吃惊。14. Before the police arrived , the alien left the shop .在警方到达之前，外星人离开了商店。before“在之前”引导时间状语从句 15. be scared （某人）给吓坏了，害怕了eg. H

15、e was scared when he heard the strange voice .当他听到了那个奇怪的声音，他害怕了。16. run away 逃跑17. walk around the station 在车站走来走去18. She didnt think about looking outside the station .她没想到过要往车站外面看一看。think about 考虑looking outside the station 是动名词短语，做think about的宾语。look outside 往外看While Hai Yan was at the doctors ,

16、I was going to class .当海燕在诊所的时候，我正要去上课。at the doctors 在诊所（医院）at the barbers 在理发店Fill in the missing lettersin these words1Whats the weather like there? Its cold and w.2What was he doing? He was cooking d.3Lets go to a ball game t .Sorry, I cantI have to study this evening4While the alien was visitin

17、g the museum, the boy called the TV s.5The boy was walking down the street when a UFOl.IIIChoose the correct answers( )1She said she was having a party for MarySaturday Aon Bin CatDfor2Ion the phone when a friend went into a barbers shop Atalked Bwas talking Ctalk Dis talking3What aboutmore trees to

18、 keep the air clean? Ato plantBplant Cplanting Dplanted4When the UFO took, the girl was in the shop Aout BoffCon Dup5It will beto work out this problem in some years Aenough easy Beasily enoughCeasy enough Dvery easily6HowI was at that time! Asurprised Bsurprise CsurprisingDsurprise7I am sorry youve

19、 missed the trainItten minutes ago Aleft Bwas leaving Cwill leaveDleaves8John was walking to school, he saw a cat in a tree ABecause BSinceCWhileDIf9My mother often asks meearly Aget up Bgot up Cgetting upDto get up10She said shea paper kite at 7: 00 yesterday Amakes Bis making Cwill makeDwas makingVChoose the right words to fill in the blanksI had a very unusual experience on SundayAt 1 ten oclock in the morning, I was walking down the street when a UFO 2 right in front of meYou can imagine how 3 it was! An alien 4 out and walked down Cent