第1个回答 2008-07-26
三天前：three days ago
前天：the day before yesterday
后天：the day after tomorrow
三天后：after three days
第2个回答 2008-07-26
three days ago;before yesterday;the after tomorrom
第3个回答 2008-07-26
three days ago
the day before yesterday
the day after tomorrow
after three days
第4个回答 2008-07-26
three days ago
the day before yesterday
the day after tomorrow
three days later