no podía dejar de

couldn't stop

→ no
phrase Rare #33,178
couldn't stop Used before an infinitive to say that someone was unable to stop doing something. It can also mean "couldn't help" in contexts such as emotions or reactions.
SP: No podía dejar de pensar en ella.
EN: I couldn't stop thinking about her.

No podía dejar de llorar.

I couldn’t stop crying.

Ella no podía dejar de pensar que la salud es importante.

She couldn't stop thinking that health is important.

El bosque estaba muy oscuro, y ella no podía dejar de temblar de miedo.

The forest was very dark, and she couldn't stop trembling with fear.

No podía dejar de reír.

I couldn't stop laughing.

No podía dejar de sospechar que había algo detrás de ello.

I couldn't help but suspect there was something behind it.

No podía dejar de mirarla.

I couldn't stop looking at her.

Tom no podía dejar de pensar en Mary.

Tom couldn't stop thinking about Mary.

No podía dejar de reírse.

He/She couldn't stop laughing.