Face to face, the truth comes out 面对面，真相白
Facts speak louder than words 事实胜于雄辩
Failure teaches success 失败是成功之母
False friends are worse than bitter enemies 口蜜腹剑的朋友比不共戴天的敌人还坏。（意同：明枪易躲，暗箭难防）
Far from eye, far from heart 眼不见，心不念
Far water does not put out near fire 远水救不了近火
Fast bind, fast find 藏得好，丢不了
Fine feathers make fine birds 佛要金装，人要衣装
Fire and water are good servants, but bad masters 水火是忠仆，也能成灾主 First come, first served 先到先招待
First impressions are most lasting 最初的印象最深刻
Fools build houses and wise men live in them 愚者造房，智才租房
Fool's haste is no speed 欲速则不达
Forbidden fruit is sweetest 禁果格外甜
Fortune favours fools 傻子有傻福
Fortune favours the brave 天佑勇者
Fortune favours those who use their judgement 智才天助
Fortune knocks once at everone's door 人人都有走运的一天
Four eyes see more than two 四只眼睛总比两只眼睛看得清
Friendship should not be all on one side 友谊靠双方