They’re, there; it’ll be alright.
“There car is parked illegally over they’re, and their towing it.”
“Their car is parked illegally over there, and they’re towing it.”
This should not be difficult.
The difference between “there,” “they’re,” and “their,” was something we (theoretically) learned in fourth grade. “I left my keys over their.” Over their what? What, of theirs, did you leave your keys over?
And, while we’re chatting, apostrophes aren’t for pluralizing*. This also should not be difficult. Apostrophes show ownership, or they slap together contractions. Please do not ever tell me about your “cat’s.” I understand that we’re all just human, and sometimes we miss a comma. It happens. Sometimes we don’t notice what autocorrect did to our sentences, and they get texted out anyway; however for the love of all that is holy, please do not turn in formal papers for “peer review” if they have huge grammar mistakes. In this day and age there is no excuse. We have magical-robot-machines with spellcheck. It takes three seconds to click “grammar check,” and for the computer to tell you that you missed three commas, and you used the wrong form of “to.”
Which leads me to my final point. If ever you’re struggling to remember the difference between “to” and “too,” just remember that “too” has too many Os.
*except in the case of lowercase letters, in which case, be sure to mind your p’s and q’s.