Learn what "why didn't you" means, when people say it, and how to use it naturally in English.

It means the speaker wants an explanation and feels the other person should have shared the information earlier.
From Billionaire’s Betrayal, Episode 44
One person asks why the other kept information about a double date secret.
Use this in a disagreement when you want to challenge someone for not telling you something. It can sound accusatory if your tone is sharp.
Scenes unlock real expressions as you watch
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