急!can could的区别-why did you just stand byintead of warning john of this risk?-But what __otherwise?he never listen to me.Acould I do B could I have done为什么选B?这里的COULD是推测还是能力啊

急!can could的区别-why did you just stand byintead of warning john of this risk?-But what __otherwise?he never listen to me.Acould I do B could I have done为什么选B?这里的COULD是推测还是能力啊 must,might,could,can't的区别 can 、would 、could 、need的区别 be able to、can、could的区别 could 和can 的区别和用法? 英语中几个短语的区别 意思.so could Inor could Iso can Inor I could could除了can的过去式还有什么理解 can could may must should的区别? can/could的联系用法和区别是?can和could的各种问题,求 can和could的用法?can和could有什么区别?什么时候用哪个? could和can的用法区别什么时候该用could什么时候该用can can、could、may 、might、must、ought 的区别和用法 can,could和will,would的用法以及区别 情态动词can could might may 的用法和区别 can和could,should,would等词语的用法区别? could ,may ,can ,must ,need,的使用,与区别等 can have ddone 与could have done 的区别在于? can 和 could 和may的区别用法 can,could和be able to的区别