And aaaaall verbs work like that?
Some verbs change their stem a bit.
That means they're irregular, I knew it!
Don't worry, sing along with Gloria Estefan as she sings "Ayer" and you will be fine!
No, seriously. Check it out, it's in our media.
Ser and ir in the past have the same conjugation!
ser ⇒ fui, fuiste, fue, fuimos, fuisteis, fueron
ir ⇒ fui, fuiste, fue, fuimos, fuisteis, fueron
In Spain, people use vosotros/vosotras for "you" (plural).
In Latin America, you'll hear people saying ustedes instead.
Tip from a Latin American:
If you use ustedes, you don't have to learn an extra conjugation form, you can always use the same conjugation as ellos/ellas.