Focus on the pronunciation of fly
English definition of “fly”
/flɑɪ/ v [I] (past tense flew /flu/, past participle flown /floʊn/) (MOVE QUICKLY)
› to move or go quickly or suddenly: Theo was startled when the door flew open. Saying she was late, Cathy flew by me and ran outside. The summer seems to have flown by (= passed quickly).