If you would have a thing well done, do it yourself. 如要是情做得好，你须亲自动手搞.
If you would know the value of money, go and try to borrow some, for the that goes a-borrowing goes a-sorrowing. 欲知金钱价，不妨把钱借；借钱味难尝，使人心悲伤.
If you would make an enemy, lend a man money and ask it of him again. 你若想与人成仇结怨，只要借钱给人再催还.
If your ears glow, someone is talking of you. 耳朵发烧，有人念叨。
Ignorance is the mother of impudence. 厚颜无耻由于愚昧无知.
Ignorance is the mother of suspicions. 无知会多疑.
Ignorance of the law excuses no man. 对法律不知不能免罪.
Ill (or Evil) gotten, ill (or evil) spent. 悖入悖出.
Ill air slays sooner thant the sword. 污浊的空气杀人比刀还要快.
Ill news comes space. 恶事传千里.
Ill news flies fast. 恶事传千里.
Ill news never comes too late 坏消息来得快.
Ill news travels fast. 坏事传千里.
Ill-gotten goods never prosper. 发横财，家不发
Ill-gotten wealth never thrives. 悖入悖出.
I'm hard up. 我经济很困难.
I'm really dead. 我真要累死了.
Imagination is more important than knowledge. 想像力比知识更重要.
Imagination is sometimes more vivid than reality. 想像有时比现实生动得多.
Improve your time and your time will improve you. 珍惜时间，时间才会珍惜你.
In a calm sea, every man is a pilot. 平静的海上易驶船.
In a great river great fish are found; but take heed lest you be drowned. 发现大河有大鱼，可得注意别溺毙.
In all things, it is better to hope than to despair. 凡事抱希望为佳，不应悲观而失望.
In an enemy spots are soon seen. 敌人的缺点容易找.
In books, are embalmed the greatest thoughts of all ages. 历代最伟大的思想都载入史册而不朽.
In doing we learn. 行而知.
In every beginning think of the end. 思前顾后.
In every country dogs bite. 天下的狗都要咬人.
In every rank, great or small, 'Tis industry supports us all. 不论高的低的各级人士，所持的都是勤劳.
In for a penny, in for a pound 一不做，二不休.
In good years corn is hay, in ill years straw is corn. 丰年五谷贱如草，荒年稻草贵如粮.
In life, as in chess, forethought wins 人生如下棋，多谋得胜利.
In life's earnest battle they only prevail, who daily march onward and never say fail. 在人生的搏斗中，只有日日前进不甘失败的人，才能获胜.
In moderating, not satisfying, desires, lies peace. 节欲不纵情，心情得安宁.
In prosperity caution, in adversity patience. 处顺境时要小心，处逆境时要耐心.
In the day of prosperity be joyful, but in the day of adversity consider. 顺利时要快乐，不利时要思索.
In the deepest water is the best fishing. 绝处能逢生.