They didn’t arrive yet. (They still didn’t arrive.)
Todavía no llegaron.
they left
salieron
At what time did you leave? (to several people)
¿A qué hora salieron?
they didn’t eat
no comieron
They wrote to me.
Me escribieron.
They spoke to me.
Me hablaron.
I am not staying
no me quedo
I stayed
me quedé
he stayed
se quedó
he didn’t stay
no se quedó
they stayed
se quedaron