时光飞逝怎么说用英语

"Time flies" is a common English expression that means time passes quickly. It is often used to describe how quickly time seems to pass, especially when you are busy or having fun. For example, you might say "I can't believe it's been a year already, time flies!" to express surprise at how quickly a year has passed. You can also use this expression to express a sense of regret or longing for the past, as in "I miss those days when we were all together, time flies and we're all grown up now."