As troll explains in this discussion, it's only a different person:
Αυτός τρώει=He eats, Εσύ τρως=you eat. In Greek, verb endings change according to person.
You can use wiktionary to check verb conjugation or noun/adjective declension, or any of the other resources suggested here https://www.duolingo.com/comment/21928011.
See here for the conjugation of "eat". http://www.neurolingo.gr/online_tools/lexiscope.htm?term=%CF%84%CF%81%CF%8E%CF%89
You really don't need all of it now, Just keep doing the sentences as you get to them and you'll get used to them in practice.
You can see the correct sentences at the top of this page. So, no your sentence is not correct.
You should start using the links we give students to learn how the language works.
Have a look here:
These are theTips & notes from the ABC Skill
which you did on April 27 have a look at all the information.
These are the Tips & notes from Basic 1 which you did on May 1 27.04.2020 5
And these are the Tips & notes for Basic 2 which you are working on now.
Every Skill has Tips & notes
Every word you need to translate has the answer in the Drop Down Hints
SEE ALL ABOUT THEM HERE
TIPS TO HELP YOU LEARN + HOW TO REPORT A PROBLEM
And check out the Greek Forum here with more links.
Have a look at all the information. And make it a habit to check out all these helpful links.
Any other questions you have just ask.