Cách sử dụng
The expression "change your tune" means to change your opinion, attitude, or behavior in a significant way. This phrase is often used when someone's views or actions differ dramatically from what they expressed or did before. It's usually used in a negative sense and implies that someone was being insincere or deceptive at first. For instance, if someone was praising a movie and then criticized it, a friend could say, "You changed your tune pretty quickly." This expression is informal, so you would not hear it much in formal writing.