1、公共标志，是以图形、色彩和文字、字母等或者其组合，表示公共区域、公共设施的用途和方位，提示和指导人们行为的标志物.public signs 公共标志There are a lot of public signs.They mean different things.他们表示不同的意思在我们谈论不理解的标志时,可以问:What does this sign mean?回答别人时,我们可以说:It means you should/shouldntNo smoking禁止吸烟It means you shouldnt smoke here.smoke 吸烟It means No smoking.N
2、o littering禁止乱丢杂物It means you shouldnt litter here.It means No littering.No parking禁止停车It means you shouldnt park here.It means No parking.No eating or drinking 禁止吃喝It means you shouldnt eat or drink here.It means No eating or drinking.Do not touch禁止触摸It means you shouldnt touchit.It means Do not to
3、uch.Be quiet 保持安静It means you should be quiet.It means Be quiet.Keep off the grass 远离草坪It means you should keep off the grass.It means Keep off the grass.Danger!危险It means you should stay away from it.It means Danger.给谓语动词增添情态色彩，表示说话人对有关行为或事物的态度和看法，认为其可能、应该或必要等。情态动词后面加动词原形。must（必须）You must stay away
4、 from the building.should（应该）You should keep off the grass.can（能）You can take a walk.当你想做某件事需要征得同意时,可以问:Can I?当你否定了别人的请求,你可以说:No,you cant.You should now.Jack:Can I go to the park?Mum:No,you cant.You should go homenow.Jack:Can I have an ice-cream?Mum:No,you cant.You should have dinner now.Jack:Can I watch TV?Mum:No,you cant.You should read your books now.Jack:Can I play computer games?Mum:No,you cant.You should go to bed now.Other public signs
