ich wusste, was

I knew what

→ ich
phrase Rare #36,594
I knew what Introduces a clause explaining what the speaker knew; the verb in that clause comes at the end.
GE: Ich wusste, was du meintest.
EN: I knew what you meant.

Ich wusste, was ich wollte.

I knew what I wanted.

Ich wusste, was Tom wollte.

I knew what Tom wanted.

Ich wusste, was sie ihm angetan haben.

I knew what they did to him.

Ich wusste, was passiert war.

I knew what had happened.

Ich wusste, was die Hansens da taten.

I knew what the Hansens were doing.

Ich wusste, was sie ihr angetan haben.

I knew what they did to her.