A discontented man knows not where to sit easy. 不满足者坐无宁时。
A disease known is half cured. 病情确诊断，治病好一半。
Admonish your friends in private, praise them in public. 在私底下要忠告你的朋友，在公开场合又表扬你的朋友。
A dog will not howl if you beat him with a bone. 骨头打狗狗不叫。
Adversity is a good discipline. 苦难是磨练人的好机会。
Adversity leads to prosperity. 逆境迎向昌盛。
Adversity makes a man wise, not rich. 患难使人聪明，但不能致富。
Adversity makes strange bedfellows. 身处逆境不择友。
Adversity successfully overcome is the highest glory. 成功地克服困难是最大的光荣。
A fair death honours the whole life. 死得光明，终身荣耀。
A fair face may hide a foul heart. 人不可貌相。
A faithful friend is hard to find. 益友难得。
A fall into the pit, a gain in your wit. 吃一堑，长一智。
After dinner sit a while, after supper walk a while. 午饭后要坐，晚饭后要走。
A father is a treasure, a brother is a comfort, but a friend is both. 父亲是财富，兄弟是安慰，朋友兼而有之。
A fault confessed is half redressed. 承认错误，等于改正一半。
Affairs that are done by due degrees are soon ended. 事情要安步就班地做，就会很快地做完。
A flow of words is no proof of wisdom. 口若悬河不能作为才智的证明。
A fool always comes short of his reckoning. 愚人常缺算计。
A fool always rushes to the fore. 傻瓜总爱强出头。
A fool and his money are soon parted. 笨蛋难聚财。
A fool attempting to be witty is an object of profoundest pity. 蠢人装聪明，实在最可怜。
A fool can ask more questions than seven wise men can answer. 一愚发问，七智结舌。
A fool may ask more questions in an hour than a wise man can answer in seven years. 愚者所问，智者难答。
A fool may give a wise man counsel. 愚者千虑，必有一得。