я и не знал, что ты

I didn't even know that you …

→ я
phrase Uncommon #25,575
I didn't even know that you … A sentence fragment that introduces something the speaker has just learned. “Знал” indicates a male speaker.
RU: Я и не знал, что ты играешь на гитаре.
EN: I didn't even know that you play the guitar.

Я и не знал, что ты умеешь летать.

I didn't know you could fly.

— Индиана Джонс и последний крестовый поход (1989)

Я и не знал, что ты замужем.

I didn’t even know you were married.

Я и не знал, что ты такой.

I didn't even know you were like that.

Я и не знал, что ты мне так нужна.

I didn't know that I needed you so much.

Я и не знал, что ты такой придурок.

I didn't even know you were such an idiot.

Я и не знал, что ты учитель.

I didn't know you were a teacher.

Я и не знал, что ты канадец.

I didn't even know you were Canadian.

Я и не знал, что ты тоже из Бостона.

I didn't even know you were from Boston too.

Я и не знал, что ты так хорошо поёшь.

I had no idea you could sing so well.