"Sa" is not a word in Spanish, so it is not anything.
It is "pon". Example: Pon la silla en la mesa. "Put the chair at the table".
ven
The affirmative tú command for "ir" (to go) is "ve." This command is used when instructing someone to go somewhere in a direct and informal manner. For example, you might say, "Ve a la tienda," which means "Go to the store."
The affirmative tú command of "salir" is "sal." This form is used to instruct someone to leave or go out. For example, you might say, "Sal de la casa," which means "Leave the house."
The tú affirmative command form of the verb "prestar" is "presta." This command is used to tell someone informally to lend or provide something. For example, you might say, "¡Presta atención!" which means "Pay attention!"
The affirmative ustedes command of pagar is "paguen."
This can be a little confusing. The form you are speaking of is "sé", which is identical to the first person indicative. To tell the difference, you must have context.
The correct "tú" command for the verb "escuchar" in Spanish is "escucha." This is the affirmative tú command form, used to tell someone to listen. If you need the negative form, it would be "no escuches."
The tú command form for "añadir" (to add) is "añade." This is the affirmative tú command used when instructing someone informally to add something. For example, you might say, "Añade el azúcar al café."
An affirmative "tu" command is what is used to tell a person you are familiar with to do something. Examples include: ¡escucha! (listen!), ¡espera! (wait!), and ¡mira! (look!).
tu as 2 frères (affirmative)
Levántese