no podía creer lo que

couldn't believe what

→ no
phrase Uncommon #20,231
couldn't believe what Used to express disbelief or surprise about something that was seen, heard, or happening. The verb forms can change depending on the subject and tense, such as “no puedo creer lo que” for “I can't believe what.”
SP: No podía creer lo que estaba viendo.
EN: I couldn't believe what I was seeing.

Tom no podía creer lo que decía Mary.

Tom couldn't believe what Mary was saying.

No podía creer lo que estaba pasando.

I couldn't believe what was happening.

Tom no podía creer lo que oía.

Tom couldn't believe what he was hearing.

No podía creer lo que oía.

I couldn't believe what I was hearing.

Tom no podía creer lo que María le dijo.

Tom couldn't believe what María told him.

Tom no podía creer lo que estaba escuchando.

Tom couldn't believe what he was hearing.

No podía creer lo que estaba viendo.

I couldn't believe what I was seeing.