Unit6NaturaldisastersPeriod5Grammar学习目标：1.进一步学习过去进行时。2.学习while和when在过去进行时中的应用。Step1预习语法1.语法简介：过去进行时态(一）构成was(were)+动词-ing构成。(二)形式过去进行时的肯定式:Iwasworking./Youwereworking./He/She/Itwasworking.We/You/Theywereworking.过去进行时的否定式:Iwasnotworking./Youwerenotworking./He/She/Itwasnotworking.We/You/Theywerenotworking.过去进行时的疑问式：Wereyouworkingattenlastnight?Yes,Iwas./No,Iwasn’t.Washeworkingattenlastnight?Yes,hewas./No,hewasn’t.(三）用法：过去进行时的意义：表示过去正在发生或进行着的动作。例如：Youwerelisteningtome./TheywerelearningEnglish.Whatwereyoudoing?HewaswatchingTV.过去进行时的用法：表示在过去某一时刻或某一时间正在进行的动作。这一特定的过去时间，除了有上下文暗示以外，一般用时间状语来表示。Whenwereyoudoingthistimeyesterday?--Wewereworkinginclass.Hewasmendinghisbikeatteno’clockyesterday.Iwasdrawingahorsewhentheteachercamein.Whileshewastryingtopassatruckbeforeher,shesawanothercarcoming.2.学习了过去进行时的语法，快来完成99---100页A1和A2部分的练习吧。做完之后，两人一组朗读对话，并核对答案。注意过去进行时的构成哦。3.聪明的你能将A2的对话改写成一段小故事吗？快来显示你的文采吧！Step2巩固练习小试牛刀：用所给动词的正确形式填空：1.Look!Somechildren____________(chat).2.Sorry,I________(help)thebabytietheshoelaceatpresent.3.Somechildren___________(chat)thistimeyesterday.4.Sorry,I_________(help)thebabytietheshoelaceatthattime.5.I_______________(wash)myfaceat6thismorning.6.She_____still______(lie)inbedthistimeyesterday.7._____you____________(watch)TVfromseventonineyesterdayevening.8.He______________(drink)teathewholemorning.9.--Wheredidyougojustnow?--Totheteachers’office.--Whatwereyoudoingthere?--I______________(solve)amathproblemwithmyteacher.Ittookusalongtimetoworkitout.Step3拓展延伸（PartB）(一)A)当两个延续（思考．举例）的动作同时发生，两个句子都可用过去进行时来表示，用while连接，如：1.People________(run)wildlywhilepiecesofglassandbricks________(fall)down.2.Yesterdayafternoon,whileDaniel_______(work)onthecomputer,Millie________(stand)besidehim.3．We______(clap)ourhandswhiletheperformers_______(march)acrossthepark.B)当一个延续的动作正在发生的时候，另外一个瞬间动作发生了，可用“when”或“while”连接，较长的动词用过去进行时，较短动词用一般过去时．1.Hellokitty_____(wave)tothevisitorswhileshe_________(dance)tothemusic.2.We_______(read)aterriblestorywhensuddenlythelights______(go)out.3.Thedoorbell_______(ring)whilewe__________(talk)onthephoneyesterday.C)一般过去时与过去进行时用法的比较:一般过去时表示在过去某个时间发生的动作或存在的状态，而过去进行时则表示在过去某一时刻或某一段时间正在进行的动作。如：Marywrotealettertoherfriendlastnight.Mary昨晚给她的朋友写了封信。（信写完了。）Marywaswritingalettertoherfriendlastnight.Mary昨晚一直在给她的朋友写信。（信不一定写完。）Practice:用when/while填空：1.______Simonarrived,Amywasreading.2.IwasreadingEnglish______theteachercamein.3._____mymotherwascooking,thephonerang.4.Mrs.Wangwaslisteningtomusic_______herhusbandwasreadingnewspapers.（二）掌握了while和when的用法之后，仔细看101页的插图，独立完成101页的练习。核对答案后，集体朗读句子。Step4Homework1.完成《补充习题》、《同步导学》中的Grammar练习。2.预习Integratedskills.
