八年级英语上册 Unit 6 National disasters Grammar（2）精品学案 牛津译林版.doc

八年级英语上册 unit 6 national disasters grammar（2）精品学案 牛津译林版主备人总 10-6 课时上课时间课 题8a unit6 natural disastersgrammar(2)past continuous tense with “while” and “when”学习目标知识目标单词：snowball ,snowman , hit词组：make a snowman ,fall over能力目标能够了解并掌握用when和while引导的时间状语从句与过去进行时连用的几种情况。情感目标学习重点学习用when和while引导的时间状语从句与过去进行时连用的几种情况。学习难点在过去进行时中正确使用when和while 。课 前 自 学*找出用when / while引导的时间状语从句与过去进行时连用的情况.查资料搞清楚它的用法.一根据汉语意思翻译下列句子。1. 当发生地震时，我正在购物。i _ _ some shopping when it _.2当玻璃、瓦片往下掉的时候，人们正慌乱地跑着。people _ _ wildly while pieces of glass and bricks _ _ down.3我正在寻找出路时，突然我听到头顶上有声音。i _ _ to find my way out when i suddenly _some noise above me. 二.讨论：有时为了句子表达的需要,我们可以用复合句来表达过去进行时.如以上3句。在过去进行时中when和while用法及其区别。 昨晚当我到家的时候,妈妈和爸爸正在看电视. my parents_(watch) tv when i arrived home last night. 刚才当老师走进教室的时候,学生们正在读书. students _(read)when the teacher came in just now.在这些句子中,when引导的句子表过去的某一个具体的时间,when从句用一般过去时,而它的主句用过去进行时. 但是若强调某个动作正在进行中时,又发生了别的动作,用when从句. when从句必用过去进行时,主句用一般过去时.(表示在when从句正进行期间又发生了主句的动作)此时, when=while,表时间段.如 _we were having supper, the light went out. _he was riding a bike, he fell off and hurt his leg. 若主,从句两个延续动作同时进行,用while,则主句与从句都用进行时, 此时,while译为“而” “一边,一边”,如:. he was reading the newspaper _ i was studying.三（热身一下吧）用 when和while填空。1my mum was sleeping _ my aunt came to visit her.2. my father was working in the garden _ i was sitting in the sun.3._ he came yesterday, we were playing basketball.4._ we were laughing , the teacher came in.5._ the whites were having supper, i knocked at the door.五.完成句子.1.当到simon的时候,amy正在从地上取雪._ simon _ , amy _ _ some snow from the ground.2.正当danial在做雪球时, 他摔倒了._ danial _ _ a snowball , he _ _.3.suzy在堆雪人的而kitty就站在她的旁边.suzy _ _ a snowman _ kitty _ _ beside her.4.正当mary在拍照的时候,andy朝她跑了过来.andy _ towards mary _ she _ _ _.5.正当我在买东西的时候,地震发生了.the earthquake _ _ i _ _ some shopping.6.刚才我看见李平和他的父母在路边等公共汽车.i _ li ping and his parents _ _ the bus _the side of the road.课 堂 交 流 展 示 展示一:在组内和班内展示课前自学中重要的短语及句型.展示二(1):根据图形用正确的时态回答问题.例句t: what was the girl doing when i came? s: she _ _ when i came.= when i came , she _ _.(2)小组模仿回答。并根据课本100页a2回答下列问题。what was mr. wu/simon/millie/sandy doing when the snowstorm came? mr.wu _ when the snowstorm came. = _. simon _ when the snowstorm came. = _. millie _ when the snowstorm came. = _. sandy _ when the snowstorm came. = _. 总结规律：句子1(延续性动作) （过去进行时）+ when +句子2（短暂性动作） （一般过去时） = when +句子2（短暂性动作），句子1（延续性动作）（注： when也可延续性动作）展示三:可用while改写例句i came while the girl was dancing= while the girl was dancing , i came .(2)用while改写以上第一题中的4个答句。 _.=_.=_.=_.= _. 总结规律：句子1(短暂性动作) （一般过去时） + while +句子2（延续性动作） （过去进行时）= while +句子2（延续性动作），句子1(短暂性动作)展示四:根据图形用连接两句含有过去进行时的句子. s1: what was she doing while we were watching tv? s2: she _ _ while we were watching tv. = while we were watching tv ,she _ _ . 总结规律：句子1(延续性动作) (过去进行时) + while +句子2（延续性动作） （过去进行时）=while + 句子2(延续性动作) , 句子1(延续性动作).展示五:让两个学生同时表演不同的动作，其他学生用while造句。展示六:完成课本101页练习。核对答案并朗读。 课 堂 达 标 检 测一 用所给单词的适当形式填空。1. your cousin _(not play) basketball when i saw him.2. when i _(leave) home ,my sister _(eat) breakfast.3. when i came to see him , daniel _(search) for some information on the internet.4. girls _ (dance) while boys _ (sing).5.when the teacher looked for them , where _ they _( play ) football.6. when i saw you , who _ you _(talk) with?二用when 和 while填空1.mother was cooking _father was watching dvd last night.2._ tommy got there , the famous scientists was giving a talk on traveling.3._ the famous scientists was giving a talk on traveling,tommy got there.4. the singer waved to us _ she was singing the song.5._ they were playing basketball , we were cheering for them.6. the telephone rang _ david was sleeping last night.7._ the telephone rang , david was sleeping last night.8._ my uncle came to see me, i was reading.三.翻译句子我妈妈正在做饭，我爸爸在看报纸当老师进教室时，学生们在相互聊天当孩子们正在上课的时，地震发生了.当我购物时，我突然听到了一声象雷一样的巨响学习感悟：课时10-6的答案:(一)1.wasnt playing 2.left ,was eating 3.was searching 4.were dancing ,were singing 5.were playing 6.were talking(二)1.while / when 2.when 3. while/ when 4. while/ when 5. while/ when 6. while/ when 7.when 8.when(三)1.my mum was cooking while my dad was reading newspape