They, their, they’re, then and than.
Just because they are similar, it does not mean you can use them interchangeably. Do you wear the same shoes with every outfit? No, probably not. So no, you can’t use the same term with every sentence. What you intended to say could be altered, completely. You will sound illiterate, just a heads up. Believe it or not, they do serve different purposes. I’m no grammar queen but that’s my little pet peeve. FIX IT PEOPLE. FIX IT.
END of mini rant.