The difference between the two questions lies in their tense and context: 1. Did you lose your mind? * Past tense: Refers to a specific point in the past when the person may have acted irrationally. * Example: "Did you lose your mind when you decided to quit your job without a backup plan?" 2. Have you lost your mind? * Present perfect tense: Implies an ongoing situation or recent behavior that seems irrational. * Example: "Have you lost your mind, spending so much money on a single meal?" In short: * Use Did for a completed past action. * Use Have for something with relevance to the present.

The difference lies in tense and the implications of the question: 1. Did you lose your mind? - This is in the past tense and refers to a specific moment in the past when the person might have acted irrationally or strangely. - Example: - Did you lose your mind when you decided to quit your job?" - It implies the action of "losing one's mind" happened at a particular time in the past. 2. Have you lost your mind? - This is in the present perfect tense, which connects the past to the present. It suggests that the person’s irrational behavior is ongoing or that the effects of their "losing their mind" are still relevant now. - Example: - "Have you lost your mind? Why are you yelling in the middle of the meeting?" - It implies their current actions are irrational or surprising. Key Difference: - "Did you lose your mind?" focuses on a past event or decision. - "Have you lost your mind?" emphasizes a current situation or behavior and its connection to the present. Both phrases are often rhetorical and used to express disbelief or shock.

Did you lose your mind refers to a specific moment in the past. Have you lost your mind refers to something from the past that’s still happening now I hear you didn’t go to work last Thursday. Omg did you lose your mind? That’s a crazy thing to do I hear you’re thinking of quitting your job? That’s crazy. Have you lost your mind?