* Homonyms are words that sound the same but have different meanings and spellings.
* There, their, and they're are the homonyms in question.
Here's an example sentence using all three:
They're going to the store to buy their groceries. There are only a few items left on the list.
* They're is a contraction of "they are".
* Their is a possessive pronoun (belonging to them).
* There indicates a location.