time flies时光易逝；光阴似箭。

时光飞逝例句：

1、Time flies, and 400 days is just a blink of an eye.时光如梭，400天的时间就在转眼之间；

2、Time flies like an arrow, fruit flies like a banana.时光像箭一样飞逝，水果像香蕉一样飞逝。