ich dachte nicht, dass du

I didn't think you'd

→ ich
phrase Rare #35,006
I didn't think you'd Introduces a subordinate clause expressing that the speaker did not expect the other person to do something. The verb at the end of the subordinate clause often uses the subjunctive II to express an expected or hypothetical action.
GE: Ich dachte nicht, dass du mich anrufen würdest.
EN: I didn't think you'd call me.

Ich dachte nicht, dass du einer bist, der ablenken will.

I didn't think you were someone who would try to distract.

— Blade Runner 2049 (2017)

Ich dachte nicht, dass du noch kommen würdest.

I didn’t think you’d still come.

Ich dachte nicht, dass du Sie meintest..

I didn't think you meant her.

— Ratatouille (2007)

Ich dachte nicht, dass du so reagierst.

I didn't think you'd react like that.

— Mommy (2014)

Ich dachte nicht, dass du es schaffen würdest.

I didn’t think you’d manage it.

Ich dachte nicht, dass du so blöd bist!

I didn’t think you were that stupid!

— Hass (1995)