Question

What does it mean to conjugate a verb? What are the endings for AR verbs in the ‘yo’, ‘tú’ and ‘él/ella/usted’ forms?

Answer 1

Example:
Yo voy a lavar mi ropa
Tu lavas tu ropa
El/Ella/Usted lava su ropa
Hope this helps
To conjugate means to just change the ending based on the tense or person. Change it to cater to the action that is being talked about or whatever the case is

Answer 2

Conjugation changes the verb to agree with the subject in number and time. We do this naturally in English because it is your language. Example. I run. He runs. It just sounds weird to us when someone says I runs- but we understand.

To understand conjugation the best think of it this way. You have a verb
Hablar- to speak.
The “root” is Habl and the “ending is ar.
All of the meaning of the verb is in habl. It always means to speak and every single time you see habl it will mean speak. You can even make nouns hablador someone who speaks ( a lot). The endings just tell you who is speaking and when they speak.
So to conjugate you that hablar and remove the ending the. You add another ending.

For present tense you would do
Yo habl o
Tu habl as
El habl a

Other tenses have different endings