Consider these two sentences:

1. I haven’t done this for a long time.
2. I haven’t done this in a long time.

Do they mean exactly the same thing, or is there a difference in meaning?

Keep reading to find out. By the end of this article, you’ll understand when in a long time is more appropriate than for a long time, and vice versa.

As always, we’ve included exercises, so be sure to test your understanding when you’re ready.