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Unit6Topic31.atrafficaccident一次交通事故byaccident偶然地，意外地2.alittlemoreconfident更自信点修饰比较级多于rather,alot,far,much甚至，更even,still稍微，有点alittle,abit3.obeythetrafficrules遵守交通规则4.saveenergy节约能源5.causeairpollution引起空气污染6.before表示从过去或将来某一时间算起多少时间以前，往往用过去完成时态或将来完成时态。ago指从现在起到过去的某一点的时间段，常用一般过去时态或过去进行时态。7.spitinpublic在公共场所吐痰8.avoiddoingsth.避免做某事9.slowdown减速10.aroundtheworld全世界=allovertheworld=throughouttheworld11.atonce立刻=rightaway12.beindanger处于危险中beintrouble处于麻烦中13.asharpturntotheleft一个向左的急转弯14.ontheleft-handsideoftheroad在道路左边=ontheleftoftheroad15.runinto撞到，碰到16.rushtosb.冲向某人17.begood/badfor对...有好处/坏处18.share...with...和...分享...19.incaseof...万一...20.firstaid急救21.call...forhelp叫/打电话给...寻求帮助22.inaword总而言之，一句话23.take...to...把...带到某地24.infact实际上，事实上25.getafine受到处罚26.warnsbtosth.警告/提醒某人做某事27.markawrongturn拐错弯28.causetrouble带来麻烦29.inone'slife一生中30.faceithead-on迎头面对31.leadsb.todosth.领导某人做某事32.goondoingsth.继续做某事33.rideintohistory载入史册34.lookout向外看，小心=becareful=watchout当心，小心35.makeacall打电话（对象不确定）giveacall打电话（对象确定）getacall接电话36.salt-water咸水freshwater淡水37.emptyinto流入，注入38.timedstages计时赛段39.gothough穿过40.finalresult最后结果41.条件状语从句A.条件状语从句由if(如果，假如),unless(除非),incase(万一),so/aslongas(只要),so/asfaras(就...而言),suppose(假设)等词或短语引导。Ifitrainstomorrow,wewillhaveadayortwooff.如果明天下雨，我们就将放一两天假。B.条件状语从句同时间状语从句一样，谓语动词常用一般现在时表示将来。主句是一般将来时，从句用一般现在时。Hewillnotbeabletocatchupwithusunlessherunsfaster.他不可能赶上我们，除非他跑得更快些。C.“祈使句+and/or+陈述句”在意思上相当于条件状语从句。Studyhardandyouwillpasstheexam.=Ifyoustudyhard,youwillpasstheexam.Hurryup,oryouwillbelate.=Ifyoudon’thurryup,youwillbelate.