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1、精品好文档，推荐学习交流重点语法一般过去时1.定义：表示过去发生的事情。2.一般过去式be动词用was，were。
3.一般过去时动词要用过去式，动词变过去式规则：1）一般直接加ed.2）以不发音的e结尾直接加d.3）辅音+y结尾，把y改i+ed.4）辅元辅，倒着数，双写最后的字母+ed.4.一般过去时关键词：yesterday(昨天)，lastyear(去年)，lastmonth(上个月)，lastnight（昨晚），lastweek（上周），threedaysago（三天前），in+过去年份（如in2001）,thismorning(今天早上)等等。仅供学
2、习与交流，如有侵权请联系网站删除谢谢4精品好文档，推荐学习交流5.不规则动词的过去式形式：6.一般过去式一般疑问句：be动词was，were时，把was，were放在句首。Wasthereany+可数名词单数或不可数名词....?Yes,therewas./No,therewasn’t.仅供学习与交流，如有侵权请联系网站删除谢谢4精品好文档，推荐学习交流Werethereany+可数名词复数.....?Yes,therewere./No,thereweren’t.有动词时变一般疑问句，把Did放句首，动词恢复原形。Did+主语+动词原形....?Yes,...d
3、id./No,...didn’t.7.一般过去时的特殊疑问句形式：What did+主语+动词原形...?回答：主语+动词过去式...Unit1LivingGreenKeytoExercisesOpenerSuggestedanswersforreference1.Therearealotofsimplethingswecandotodecreaseenergyconsumption.Herearejustafewexamples:Useenergyefficientlightbulbsforourmost-usedlights.Whenweleavearoom
4、,turnoffthelight.Turnoffourcomputer/laptopwhenwearenotusingit.Savewater.Takequickershowers.Whenbrushingteethweshouldnotleavefaucetrunning.Usereusableclothshoppingbagsthataremadefromplantfibers.仅供学习与交流，如有侵权请联系网站删除谢谢4精品好文档，推荐学习交流Wheneverpossible,walk,bike,carpool,orusepublictransportat
5、ion.2.Oldclothesandbooks:Otherpeoplecanreuseourunwantedclothesandbooksifwedonatethem.Oldclothescanalsobemadeintootheritemssuchascushioncovers.Oldelectricalequipment:Donateoldelectricalequipmenttoschoolsorcommunitycenterssothatotherscanreusethem.Rechargeablebatteries:Unlikeregularbatt
6、eriesthatcreateunnecessarywaste,rechargeablebatteriescanbereusedmanytimesbeforetheyneedtobethrownaway.Jarsandpots:Bycleaningglassjarsandsmallpots,wecanusethemassmallcontainerstostoreoddsandends（零星物品）.3.Livinggreenmeansreducingone’scarbonfootprint,or,moregenerally,makingassmallanimpac
7、tonthenaturalenvironmentaspossible.Yes,Ihavethoughtaboutit.Icantakesomesmallstepstorestrictenergyconsumption.Forexample,takingshorter,coolershowers.InthatwayIcansaveenergybyminimizinghotwateruse.仅供学习与交流，如有侵权请联系网站删除谢谢4
