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[saɪn]Therearemanydifferentsignsaroundus.Somearelikethese:Othersarelikethese:Weneedsignsinourlife.Whenwecan’tfindtheway找不到路.Signscantelluswheretogoandhowtogo.Signsarelikethepolicemen.Whenwearelost迷路.SignscantellusWhattodoandwhatnottodo.Signsarelikeourteachers.SometimessignscantellusWhatisdangerous危险的andwhatissafe安全.Signsarelikeourfriends.ThesesignstellusDifferentsignshavedifferentmeanings意思.wecan可以find找到/use使用/eat/getinto/getout…Differentsignshavedifferentmeanings.Thesesignstellusweshouldn’t不该/can’t不可以/mustn’t禁止dosomething.--Whatdoesthissignsay?--Itsays‘Nosmoking’.--Whatdoesthissignmean?--Itmeanswemustn’tswimhere.[miːn]意指；意味着--Whatdoesthissignmean?--Itmeans‘Don’tlitter’.--Whatdoesthissignmean?--Itmeanswemustn’twalkonthegrass.[miːn]意指；意味着[‘lɪtə]乱扔废弃物youshouldn’tthrowyourrubbishhere.[θrəʊ]['rʌbɪʃ]--Whatdoesthissignsay/mean?--Itsays‘…’Nodogs!Don’teathere!Nospitting!weshouldn’t/can’t/mustn’t…/Itmeans...Lookatthesign!walkonthegrassthrowyourrubbish=litter乱扔垃圾bequieteatnicefoodYoumustn’t/shouldn’tYoumustYoucanLookatthesign!walkonthegrassthrowyourrubbish=litter乱扔垃圾bequieteatnicefoodYoumustn’t/shouldn’tYoumustYoucanWhenIam___________.Iseethissign.Itmeans‘________________.’intheparkNoballgamesWherecanyouseeit?Whatdoesthissignmean？=?Don’tplayballgameshereWecan’tplayballgameshere.