не могу перестать думать о том, что

I can't stop thinking about what

→ не
phrase Rare #39,694
I can't stop thinking about what Introduces a thought or situation that someone cannot stop thinking about. The subject is often omitted because it is understood from context.
RU: Не могу перестать думать о том, что произошло.
EN: I can't stop thinking about what happened.