j'ai remarqué que

I noticed that

→ je
phrase Rare #31,221
I noticed that Used to introduce something you observed or became aware of. It is followed by a clause, often with a verb in the imperfect tense when describing an ongoing situation in the past.
FR: J'ai remarqué que tu avais changé de coiffure.
EN: I noticed that you had changed your hairstyle.

J'ai remarqué que ses mains tremblaient.

I noticed that his hands were trembling.

J'ai remarqué que j'étais le plus jeune de tous.

I noticed that I was the youngest of them all.

— Whiplash (2014)

J'ai regardé autour et j'ai remarqué que c'était la seule voiture sur la route.

I looked around and noticed that it was the only car on the road.

J'ai remarqué que vous n'étiez pas chez vous hier soir.

I noticed that you weren't home last night.

J'ai remarqué que la vitre faisait du bruit.

I noticed the window was making noise.

Soudain j'ai remarqué que ma montre avait disparu.

Suddenly, I noticed that my watch was gone.

J'ai remarqué que ses baskets étaient très vieilles.

I noticed that their sneakers were very old.

— Memories of Murder (2003)