should 分类：情态动词 定义 应该，表示建议、义务或推测。 用法 表示建议或义务(应该) 表示推测(应该会) 用于虚拟语气 should have done表示’本应该’ 例句 You should study harder. (建议) They should arrive soon. (推测) I suggest that he should go. (虚拟) You should have told me. (本应该) 相关术语 ought to must should have done 情态动词