A big pet peeve of mine is when writers use the word “of” instead of “have,” e.g. “would of,” “should of,” or “could of.” I realize that when spoken, particularly by Southerners, this is how it may sound. However, it is incorrect. The correct verb constructions are:
The fact that many of my students graduated high school without having this bad habit corrected fills me with an overwhelming, claustrophobic sense of doom for the human race.