je sais pas comment

I don't know how

→ je
phrase Rare #22,001
I don't know how Informal spoken French; the standard form is « je ne sais pas comment ». It can be followed by an infinitive or a full clause, and can also stand alone.
FR: Je sais pas comment lui annoncer la nouvelle.
EN: I don't know how to tell him the news.

Je sais pas comment il a fait pour s'en sortir, ce con.

I don't know how that idiot managed to get out of it.

— Ne le dis à personne (2006)

Je sais pas comment te remercier.

I don't know how to thank you.

— Volver (2006)

Je sais pas comment te demander pardon.

I don't know how to apologize to you.

— La Vie d'Adèle - Chapitres 1 et 2 (2013)

Je sais pas comment m'en sortir.

I don't know how to get out of this.

— Silent Voice (2016)

Je sais pas comment, mais je m'en doutais.

I don't know how, but I suspected it.

— Parle avec elle (2002)

Je sais pas comment il s'y est pris, mais il a réussi.

I don't know how he did it, but he managed.

— American Gangster (2007)

Je sais pas comment tu fais.

I don't know how you do it.

— Titane (2021)

Je sais pas comment te dire.

I don't know how to tell you.

— Avengers : Infinity War (2018)

Je sais pas comment.

I don't know how.

Je sais pas comment te faire comprendre ça!

I don't know how to make you understand that!

— Cinema Paradiso (1988)

Au prix des bouquins, je sais pas comment faire.

With the price of books, I don't know how to manage.

— La Haine (1995)

Je sais pas comment t'expliquer.

I don't know how to explain it to you.

— La Vie d'Adèle - Chapitres 1 et 2 (2013)

Je sais pas comment je dois le prendre.

I don't know how I should take it.

— Douleur et gloire (2019)