je pensais que tu

I thought you...

→ je
phrase Very common #1,658
I thought you... Used to express a past belief or assumption about the person being addressed. The verb after tu is usually in the imperfect tense.
FR: Je pensais que tu étais déjà parti.
EN: I thought you had already left.

Je pensais que tu changerais.

I thought you would change.

Je pensais que tu en aurais besoin.

I thought you would need it.

— Suspiria (1977)

Je pensais que tu détesterais la campagne plus que ça.

I thought you would hate the countryside more than that.

— Departures (2008)

Je pensais que tu sortais avec elle.

I thought you were dating her.

Je pensais que tu plaisantais.

I thought you were joking.

Je pensais que tu y serais toute la nuit.

I thought you'd be there all night.

— Star Trek (2009)

Je pensais que tu ignorais ça.

I thought you were ignoring that.

Je pensais que tu comprenais ça.

I thought you understood that.

Je pensais que tu trouverais ça intéressant.

I thought you’d find it interesting.

Je pensais que tu ignorais cela.

I thought you were ignoring that.

Je pensais que tu gagnais toujours.

I thought you always won.

Je pensais que tu en avais déjà une.

I thought you already had one.

Je pensais que tu pleurais.

I thought you were crying.

— Jojo Rabbit (2019)