Pronouns REPLACE Nouns - here is a refresher on how to do that.

Nouns are PEOPLE/PLACES/THINGS (when conjugating verbs you will most likely see NAMES of people and you will need to replace them with the correct pronoun)

If you see ONE NAME (male, female, or neutral) use the "el/ella" form

If you see TWO OR MORE NAMES use the "ellos/ellas" form

If you see a NAME (or more) and the pronoun YO use the "nosotros" form

If you see a NAME (or more) and the pronoun TÚ or USTED use the "ustedes" form