Thanks 楼上两位

来源: 学英语3151 于 2011-06-22 06:31:15 [] [旧帖] [给我悄悄话] 阅读数 : (232 bytes)
回答: 提上来讨论一个写作问题 由 学英语3151 于 2011-06-21 11:49:06

Yes, I understand the concept when to use past progressive. But in the case I mentioned, when both simple past and past progressive are both grammarly correct, I was having hard time to choose one or the other 

请您先登陆，再发跟帖！