事實勝於雄辯。
failure is the mother of success.
false friends are worse than bitter enemies.
明槍易躲，暗箭難防。
far from eye, far from heart.
眼不見，心不煩。
far water does not put out near fire.
遠水救不了近火。
faults are thick where love is thin.
一朝情意淡，樣樣不順眼。
fear always springs from ignorance.
恐懼源於無知。
fields have eyes, and woods have ears.
隔牆有耳。
fire and water have no mercy.
水火無情。
fire is a good servant but a bad master.
火是一把雙刃劍。
first come, first served.
先來後到。
first impressions are half the battle.
初次見面，印象最深。
first think and then speak.
先想後說。
fools grow without watering.
朽木不可雕。
fool's haste is no speed.
fools has fortune.