My Private Glossary: Commonly Confused Pairs & Triplets

Affect (influence) vs. Effect (result)

Its (possessive) vs. It’s (it is)

Their (possessive) vs. There (place) vs. They’re (they are)

To (direction) vs. Too (also) vs. Two (number)

Principal (main) vs. Principle (rule)

Then (time) vs. Than (comparison)

Lose (not win) vs. Loose (not tight)