Cách sử dụng
The expression "time flies" is used to describe how quickly time passes. We might use it when we're having fun and feel like the time has gone by really fast. For example, if you're playing with your friends and suddenly realize that it's already dark outside, you might say "time flies when you're having fun!" It's a way to express how surprised we are that so much time has passed or that an event is already over.