中考英语中can,should,could,must的具体用法及区别答:情态动词数量不多,但用途广泛,主要有下列: can (could), may (might), must, need, ought to, dare (dared), shall (should), will (would),have (to) ,had better. can和could的用法 1. 表示能力或客观可能性,还可以表示请求和允许。如: Can you finish this work tonight? Man cannot live ...