She listens to music on her phone.

Meaning: This means that she uses a device used for communication to pay attention to a composition created using sound.

Choice of Words: Listen means to pay attention to sound. To indicates the direction or destination of an action or motion. Music is an art form that uses sound to create a composition. On indicates a position or location. Phone is a device used for communication. When you put them together, it means she pays attention to a composition created using sound using a device used for communication.

Alternative Expressions

Related Expressions