Marta y yo (1) (ponerse) elegantes y (2) (maquillarse) para ir al estreno de la nueva película.
(1) nos ponemos
(2) nos maquillamos

1. Nos pusimos.

2. Nos maquillamos.

Explanation:

Identifying the narrator and the time that a sentence indicates is the first step that must be taken. this is very important to be able to conjugate the verbs, and that these have concordance with what is being expressed