was going to say
Yo ya sabía lo que iba a decir.
I already knew what he was going to say.
Te iba a decir que mejor no subas.
I was going to tell you that it's better not to go up.
— Jojo Rabbit (2019)
Tienes un lado femenino, ¿quién lo iba a decir?
You have a feminine side, who would have thought?
— Tu nombre (2016)
I was going to say the same thing about you.
Eso no era lo que iba a decir.
That's not what I was going to say.
Se me olvidó lo que iba a decir.
I forgot what I was going to say.