Learn what "i don't know how it happened" means, when people say it, and how to use it naturally in English.

This means the speaker is saying they do not understand the cause or sequence of events.
From Married To A Stranger, Episode 21
The speaker is explaining that they cannot clearly explain how a situation ended up this way.
Use this when you want to say something happened unexpectedly or you cannot explain it. It sounds natural in conversation and can also sound defensive if used after a problem.
Scenes unlock real expressions as you watch
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