副词前天; 前日

1. 前：头一天(yesterday)和当天(today)的课,第二天全天都能下载的. 之前(the day before yesterday)的课下载时间才是每天晚6点至次日9点. :P:P:P

2. 昨天：238. the day after tomorrow 后天 | 239. the day before yesterday 昨天 | 240. the more..., the more.. 越......,就越......

3. (演讲)：2The students have a ten minutes' (休息) between two classes | 3Mr Wu made a (演讲) the day before yesterday | 4The sun (升起) in the east early in the morning