Effect vs. Affect
This is one of the most common errors people make, and I frequently come across people arguing about it. The explanations of how to use them properly are easy to find, but the conceptual difference between the two does not seem to stick in people’s mind. The confusion comes from the fact that “effect” can be used as a verb, although it’s rare. If it didn’t, there wouldn’t be any confusion (i.e. “effect” = noun and “affect” = verb). To make it worse, “effect” used as a verb is pretty close in meaning to “affect”. And, if that’s not confusing enough, “affect” can also be used as a noun, and it’s also similar in meaning to “effect” as a noun.
So, the only way to get the hang of using them properly is to see actual examples. While I was arguing about this with a friend of mine, I came across this quiz that tests your ability to use “effect” and “affect” properly. I’m curious how well or badly everyone does on this quiz.