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。
A fool may throw a stone into a well which a hundred wise men cannot pull out. 一愚所失，百智难回。
A fool knows more in his own house than a wise man in another. 一个蠢材在他自己家里所知的事比一个聪明人在别人家里所知的事要多。