- look back, look backward - look towards one's back; "don't look back while you walk"
--1 is one way to look
Sample sentence:
They look back up the hill
- review, look back, retrospect - look back upon (a period of time, sequence of events, etc.); remember; "she reviewed her achievements with pride"
--2 is one way to remember, think back
Sample sentence:
Somebody ----s something