This is a regular verb. It follows the conjugation pattern of the verb hablar.
PresentPresente
Todavía ignoro el resultado del examen.
I still don't know the result of the exam.
ImperfectPretérito imperfecto
Entonces ignorábamos que el tren salía a las ocho.
Back then we didn't know the train left at eight.
FutureFuturo
Si no lees las noticias, ignorarás lo que pasa.
If you don't read the news, you won't know what's happening.