the day/week/year etc before lastBEFOREthe day, week etc before the one that has just finished 前天/上上周/前年等 I sent the letter off the week before last. 我是上上个星期把信寄出的。
the day/week/year etc before last• In the week before last, claims rose by 22,000.• The Sunday newspaper articles had come out the week before last, and were still bringing in letters.• I didn't know myself where the house was until the week before last.
→ the day/week/year etc before last at last3(3)