what does this sign mean?意思是:这一个符号的意思是什么?it means you shouldn't smoke. 意思是: 这个意思是你不应该吸烟。括号内是smoke.
smoke(上面是smok)
should can may和must是情态动词,情态动词后面动词用原型
smok 我保证
当然是Smoke啦。should后面加动词原形