no podía entender por qué

couldn't understand why

→ no
phrase Rare #46,870
couldn't understand why Used to say that someone was unable to understand the reason for something. The verb podía is in the imperfect tense, referring to an ongoing or repeated inability in the past.
SP: No podía entender por qué todos estaban tan preocupados.
EN: I couldn't understand why everyone was so worried.

Tom no podía entender por qué no le gustaba a Mary.

Tom couldn't understand why Mary didn't like him.

Tom no podía entender por qué Mary se reía de él.

Tom couldn't understand why Mary was laughing at him.

Tom no podía entender por qué nadie más parecía estar contento.

Tom couldn't understand why no one else seemed to be happy.

Tom no podía entender por qué Mary se tenía que ir.

Tom couldn't understand why Mary had to leave.