English phrase from drama scenes

What Does "i don't know" Mean?

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

Beginner
Neutral
Soft
Apologize

I don't know how I could be so stupid.

It means the speaker is blaming themselves for acting foolishly or making a bad choice.

From Married To A Stranger, Episode 60

When do people say this?

Scene Context

The speaker criticizes themselves for making a very foolish mistake.

Usage Scenario

Use this when you regret a mistake or feel embarrassed about your own actions. It is emotionally strong and sounds self-critical.

Better ways to say it

1
I don't know how I could be so stupid.
2
How could I be so stupid?
3
I was so stupid.

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How to Apologize in English

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