was going to
Tom me dijo que no se iba a atrasar, pero todavía no se aparece.
Tom told me he wouldn’t be late, but he still hasn’t shown up.
No sabía que se iba a sentar adelante.
I didn't know she was going to sit in the front.
— Jungla de cristal (1988)
Cuando la conocimos ya sabía que se iba a morir.
When we met her, I already knew she was going to die.
— Y tu mamá también (2001)
Tsukasa dijo que se iba a dar un baño.
Tsukasa said she was going to take a bath.
— Your Name (2016)
Santiago se iba a ir por el resto de su vida.
Santiago was going to leave for the rest of his life.
— Algunos hombres buenos (1992)
Todos en el barco pensaron que se iba a hundir.
Everyone on the ship thought it was going to sink.