Cách sử dụng
The expression "somebody's back is turned" means that someone is not paying attention or watching something because their back is facing it. It can be used to describe situations where someone is doing something sneaky or dishonest when they think no one is looking. For example, you might say "I caught him stealing from the store when his back was turned." It can also be used to describe situations where someone is unaware of their surroundings, such as "I surprised her when her back was turned because she didn't hear me come in."