while back|while Thành ngữ, tục ngữ
while back|while
adv. At a time several weeks or months in the past.

Used with "a".
We had a good rain a while back, but we need more now. Grandfather is well now, but a while back he was in the hospital for three weeks. See: CRACK THE WHIP.
while back|while
adv. At a time several weeks or months in the past.

Used with "a".
We had a acceptable rain a while back, but we charge added now. Grandfather is able-bodied now, but a while aback he was in the hospital for three weeks. See: CRACK THE WHIP. Dictionary