could除了can的过去式还有什么理解 can could may must should的区别?

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/15 04:53:12

could的非过去式用法：
指现在或未来的"能力"(ability in the present)或者"意愿"(willingness):
＊Right now I could eat an ox.(指现在)
＊Could you run the business by yourself?(指现在)
＊Come when you like,I could see you at any time.(指未来)
＊Perhaps I could see you tomorrow.(指未来)
＊Maybe we could go shopping this evening.(指未来)
情态动词中 can语气没有could委婉,表推测时都表示可能,否定是不可能,一般不用于肯定句
表推测时,may表可能,否定是可能不；must表一定,不用于否定句；should表应该.
mustn't只表禁止.
再问：那这只猫肯定不是他的怎么说呢，
再答：语气很强烈，很肯定，最好用can't来造句子，couldn't相对委婉。

could除了can的过去式还有什么理解 can could may must should的区别? must should could can may表示推测时有什么区别? shall should may might can could must虚拟语气的用法与区别比较 can、could、may 、might、must、ought 的区别和用法 could ,may ,can ,must ,need,的使用,与区别等 may can must should could would should,would,could,must,might,may,can can,might,may,could,must的用法 must should can/could 的区别和用法 can,must,have to,should,may,could,might有语态上有什么区别,怎么区别 can you...could you...怎么区别?还有may,should 情态动词的用法can/could/may/might/will/would/shall/should/must/can'