Why did you do it?
Meaning: This means to ask someone the reason or purpose for their action. It's like saying, Can you explain to me why you did that?
Choice of Words: Why is a question word used to ask about the reason or purpose for something. Did is a past tense form of the verb do, which means to perform an action. You is a pronoun that refers to the person being spoken to. It is a pronoun that refers to something that has already been mentioned or is understood from the context. When you put them together, "Why did you do it?" means to ask about the reason or purpose for someone's action.
Alternative Expressions
Related Expressions