江苏省涟水县大东中学八年级英语上册 Unit 8 Natural disasters Grammar2导学案（无答案）（新版）牛津版.doc

unit 8 natural disasters grammar2一、teaching aims:1、单词：snowball ,snowman , hit 词组：make a snowman ,fall over2、 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。二knowledge to prepare: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。1、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.2、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.1、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2、_we were having supper, the light went out.3、_he was riding a bike, he fell off and hurt his leg.4、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.3 teaching contents:一）:在组内和班内展示课前自学中重要的短语及句型.二）(1):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= when +句2（短暂性动作），句子1（延续性动作）（注： when也可延续性动作）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。 _.=_.=_.=_.= _.四）让两个学生同时表演不同的动作，其他学生用while造句。五）完成课本101页练习。核对答案并朗读。 4 knowledge carding1、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)2、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 _ _ .3、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).五compliance testing: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四.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 _ to