Why did you do that?
Meaning: This is a question to ask someone why they did something. It's like saying, Please tell me the reason why you behaved or acted in that way.
Choice of Words: Why is a question word used to ask about the reason or cause of something. Did is a past tense form of the verb 'do', which indicates an action or occurrence. You is a pronoun that refers to the person being spoken to. That refers to a specific action or behavior. When you ask "Why did you do that?," you are asking someone to explain the reason behind their action or behavior.
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Related Expressions