问题描述: could只是can 的过去式吗 1个回答 分类:英语 2014-10-06 问题解答: 我来补答 1.(用于虚拟语气,表示与现在或过去事实相反的设想)能,可以:If i could go with you,i should feel very glad.2.(表示较can不确定的可能性)可能,大概:The weather in Shanghai could be very cold in winter.3.(表示较can委婉的请求或建议)能,可以:Could you do me a favor? 展开全文阅读