问题描述: for与since怎么区别?我知道for+一段时间,since+?怎么才能比较好记住? 1个回答 分类:综合 2014-10-01 问题解答: 我来补答 for + 时间段:I stay there for two days.(我在那儿呆了两天)since + 一般过去时:I've been studying hard since i got his encouragement .(自从得到他的鼓励后,我就一直在努力学习了) 展开全文阅读