j'oublierais

would forget

→ oublier
oubli to forget + er Infinitive + ais je/tu conditional ending
verb · 1st-person singular / 2nd-person singular Rare #47,439
would forget In standard French, this form can mean either “I would forget” or “you would forget”; the subject in context makes clear which one.
FR: Sans mon agenda, j’oublierais les rendez-vous.
EN: Without my calendar, I would forget the appointments.
Conjugation of oublier
Conditional
SingularPlural
First oublierais —
Second oublierais —

Grâce à cela, je ne l'oublierais jamais.

Thanks to that, I would never forget it.

— Chungking Express (1994)

J'oublierais de boire et de manger.

I would forget to eat and drink.

— मुन्ना भाई एम बी बी एस (2003)

Je prendrais avec moi toutes les mémoires que je n’oublierais jamais.

I would take with me all the memories I would never forget.

Pas que tu m'oublierais du jour au lendemain.

Not that you'd forget me overnight.

— Mirage (2018)

Tu m'oublierais.

You would forget me.

— Cours, Lola, cours (1998)