should的十种用法

should是一个极其常用的情态动词。下面就它的各种意义和用法作一概述:1.should与第二、三人称主语连用时,具有“强制、命令、威胁”的意思。例如:The students should return all these balls as soon as their P.E.classis over.(命令)。体育课一结束学生们就得把所有的球还回去。2.should用于语气较强的if从句中,意为“万一”、“竟然”。例如:If it should rain tomorrow,the game would be played indoors.万一明天下雨,比赛就在室内举行。Should I go to Europe this summer,I would probably go by ship.倘若我今年夏天去欧洲的…