Cách sử dụng
The expression "to be on another planet" is used to describe a situation where someone is completely unaware or disconnected from what is happening around them. It implies that the person is so distracted or uninvolved that they might as well be living on a different planet. For example, if a teacher is explaining a lesson and a student is daydreaming and not paying attention, someone might say "You're on another planet, aren't you?" to indicate that the student is not engaged in the lesson. Similarly, if someone is not reacting appropriately to a situation or is behaving strangely, they might be described as being "on another planet." So, the expression is used to convey a sense of disconnection, distraction or unresponsiveness to what is happening around the person. It's important to note that this expression is informal and is used more in casual conversations than in formal situations.