八年级英语上册Unit6NationaldisastersGrammar（2）精品学案牛津译林版主备人总10-6课时上课时间课题8AUnit6NaturaldisastersGrammar(2)pastcontinuoustensewith“while”and“when”学习目标知识目标单词：Snowball,snowman,hit词组：Makeasnowman,fallover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_____________someshoppingwhenit__________.2．当玻璃、瓦片往下掉的时候，人们正慌乱地跑着。People_________________wildlywhilepiecesofglassandbricks________________down.3．我正在寻找出路时，突然我听到头顶上有声音。I________________tofindmywayoutwhenIsuddenly________Somenoiseaboveme.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.Myparents_________(watch)TVwhenIarrivedhomelastnight.•刚才当老师走进教室的时候,学生们正在读书.Students____________(read)whentheteachercameinjustnow.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•__________wewerehavingsupper,thelightwentout.•____________hewasridingabike,hefelloffandhurthisleg.•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:.Hewasreadingthenewspaper__________Iwasstudying.三．（热身一下吧）用when和while填空。1．Mymumwassleeping______myauntcametovisither.2.Myfatherwasworkinginthegarden_______Iwassittinginthesun.3.________hecameyesterday,wewereplayingbasketball.4._______wewerelaughing,theteachercamein.5._______theWhiteswerehavingsupper,Iknockedatthedoor.五.完成句子.1.当到Simon的时候,Amy正在从地上取雪.________Simon________,Amy_______________somesnowfromtheground.2.正当Danial在做雪球时,他摔倒了.________Danial________________asnowball,he________________.3.Suzy在堆雪人的而Kitty就站在她的旁边.Suzy__________________asnowman________Kitty_______________besideher.4.正当Mary在拍照的时候,Andy朝她跑了过来.Andy_________towardsMary________she_________________________.5.正当我在买东西的时候,地震发生了.Theearthquake_________________I_______________someshopping.6.刚才我看见李平和他的父母在路边等公共汽车.I_______LiPingandhisparents___________________thebus______thesideoftheroad.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①T:WhatwasthegirldoingwhenIcame?S:She______________whenIcame.=WhenIcame,she_____________.(2)小组模仿回答。并根据课本100页A2回答下列问题。WhatwasMr.Wu/Simon/Millie/Sandydoingwhenthesnowstormcame?①Mr.Wu_________________whenthesnowstormcame.=__________________________________________________.②Simon_________________whenthesnowstormcame.=__________________________________________________.③Millie_________________whenthesnowstormcame.=__________________________________________________.④Sandy_________________whenthesnowstormcame.=__________________________________________________.※总结规律：句子1(延续性动作)（过去进行时）+Wh...
