新版pep六年级英语上册Unit2-B-Lets-learn

Unit2WaystogotoschoolPartBLet’slearnlighttrafficlightslightsTheyaretrafficlights.Whatcolorsarethey?redyellowgreenalightWhatcolouristhetrafficlight?Canyouguess?Whatdoestheredlightmean?Stopandwaitataredlight.表示…的意思Whatcolouristhetrafficlight?Whatshouldwedowhenthetrafficlightisgreen?Goatagreenlight.Whatcoloristhetrafficlight?Whatshouldwedowhenthetrafficlightisyellow?Slowdownandstopatayellowlight.Slowdownandstop慢下来并停下。小贴士：slow(反义词)—fastdown(反义词)—up•GametimeSlowdownandstop!Stopandwait!Let’sgo!Whatarethey?•Slowdownandstopatyellowlight.•Stopandwaitataredlight.•Goatagreenlight.Theyaretrafficrules.交通规则Mike:Look!Theparkisoverthere!Let’sgo!MrsSmith:Pleasewait!It’srednow.Wemuststopandwait.naturepark必须在那儿如何用must表示必须做某事句型结构：主语+must+动词原形（+其他）Must是情态动词，意为“必须”，语气很强烈，没有人称和数的变化，后面接动词原形。例：Wemustfinishourhomeworkfirst.我们必须先完成我们的家庭作业。1.Ifthelightisred,youmust___________.2.Ifthelightisgreen,youmust___________.3.Ifthelightisyellow,youmust___________.SlowdownandstopgoStopandwait