no creía que

I didn't think that

→ no
phrase Uncommon #21,843
I didn't think that The subject can change depending on context. It is often followed by the subjunctive when introducing a thought about something uncertain or hypothetical.
SP: No creía que fuera tan tarde.
EN: I didn't think it was so late.

No creía que Tom lo haría.

I didn't think Tom would do it.

Tom dijo que no creía que Mary y yo realmente lo hiciéramos solos.

Tom said he didn’t think Mary and I would really do it on our own.

Mary le dijo a Tom que no creía que John fuese aburrido.

Mary told Tom that she didn't think John was boring.

No creía que nadie se diera cuenta de lo que estaba pasando.

I didn’t think anyone would notice what was going on.

No creía que fuera tan complicado resolver ese problema.

I didn't think it would be that complicated to solve that problem.

No creía que Tom tendría miedo a hacer eso.

I didn’t think Tom would be afraid to do that.

Tom dijo que no creía que quisieras hacer eso de verdad.

Tom said he didn't think you really wanted to do that.

No creía que Tom estaría de acuerdo en hacer eso.

I didn’t think Tom would agree to do that.

No creía que sería tan fácil.

I didn't think it would be so easy.

— Astérix & Obélix : Mission Cléopâtre (2002)

Tom no creía que Mary estuviera lista para hacer eso.

Tom didn’t think Mary was ready to do that.

No creía que fueras tú.

I didn't think it was you.

— Un día especial (1977)

No creía que Tom tenía una placa de conducir.

I didn't think Tom had a driver's license.

No creía que Tom fuera a venir.

I didn't think Tom would come.

Tom no creía que Mary fuera capaz de hacer algo semejante.

Tom didn't think Mary was capable of doing anything like that.

No creía que me pudiera pasar algo así.

I didn't think something like this could happen to me.

— Pacto de sangre (1944)

No creía que fuera a acabar así.

I didn't think it would end like this.

— El señor de los anillos: El retorno del rey (2003)

Tom le dijo a Mary que no creía que John fuera maleducado.

Tom told Mary that he didn’t think John was rude.

Él no creía que nadie haya tenido el derecho a actuar así.

He did not believe that anyone had the right to act that way.