曾几何时

Explanation: Geometry: several, many. Have much time. That did not take long. 　　Usage: Partial official; for clause; that time is near 　　Source: Song Zhao Yan-side "refer Lotus Temple Words" words: "bring back points, light wind slowly Fifi. Once upon a time, so the mountain of non-suspect the dreams." 　　Examples: ~, He came back to do a little Guaner, and he advised me to learn the law and politics. (Guo "youth around anyway") 　　Riddle: How long the monks to Thesaurus:  (as) quick as wink, streamer evanescence, Day inalienable sundial, curl up one's leg and wait, Grabbing amongst, A fillip are