Answer:
Tu: It stays the same of we are talking to another person but if we are talking about ourselves it becomes yo.
Pagar: If WE are paying it becomes Pago. Example: Yo pago mi almuerzo. But if we are talking to someone else it becomes Pagas. Example: Tu pagas el almuerzo.
Hope it makes sense!
No llegue tarde a clases.
Abran los libros a la página 30.
Vayan al auditorio al mediodia.
Recogan los libros del piso.
Estudien los verbos nuevos cada noche.
We exist translates to “existemos” or “nosotros existemos”
Uh what service can be requested with each form? I just translated it :)