should can may would could 有什么区别

问题描述:

should can may would could 有什么区别

should表示“应该做...”,can表示“能够做...”,may表示"有可能做...",would表示“将要做...”,蕴含潜在的可能性,could是can的过去式,同时也是can的委婉表达法.