sooner or later: eventually, after a period of time Examples of SOONER OR LATER I’ll get around to it sooner or later. If you study English seriously, sooner or later you’ll become fluent. Sooner or later, everyone catches a cold.

once and for all: finally, absolutely Examples of ONCE AND FOR ALL We’re going to solve this mystery once and for all, the detective thought to himself. After trying repeatedly, they were able to get the engine fixed once and for all.

to take for: to perceive or understand as Examples of TO TAKE FOR “Do you take me for a fool?” the policeman asked the suspect, when he started contradicting his story. I miss my ex-girlfriend; I shouldn’t have taken her for granted.

to cut out: to remove by cutting; to stop doing something (for thesecond definition, also: to knock it off) Examples of TO CUT OUT Employees coached her as she used their machinery to cut out and assemble shoes. Use the cutter to cut out 12 discs and use to line the bases in the muffin…

to knock out: to make unconscious; to impress or attract greatlyThis idiom can be made into the noun from knockout for both definitions. Examples of TO KNOCK OUT The prizefighter knocked out his opponent with one punch. The stone hit her on the head and knocked her out for a few minutes.  

to look over: to examine, to inspect closely (also: to go over, to read over,to check over) Examples of LOOK OVER The supervisor scheduled a meeting to look over her report. The doctor needed to look over the file in detail, before he could reach a correct diagnosis.