Learn the tone, meaning, and better English alternatives around "i don't know" with real scene examples.

This line accuses someone of cheating and suggests the speaker believes it has been going on for a while.
From Do Not Deceive Me, Episode 20
The speaker confronts someone suspected of cheating and implies they have been doing it for a long time.
Use this in a relationship argument when accusing someone directly. It sounds hostile and confrontational, so it is not polite or suitable for calm conversation.
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