Years bring wisdom. 年长智也增 。
Yesterday is dead, forget it; tomorrow does not exist, dont worry; today is here, use it. 昨天已经消逝，把它忘掉；明天还未来到，不必烦恼；今天就在眼前，把它用好 。
Yesterday will not be called again. 光阴一去不复返 。
You are the greatest enemy if you are a coward, but if you are brave, you are your greatest friend. 如果你是胆小鬼，你就是自己最大的敌人；如果你是勇敢者 ， 你就是自己最好的朋友 。
You can do more than strike while the iron is hot; you can make the iron hot by striking. 铁热时，你能做的不止是锤打，而锤打可使铁热 。
You can fool some of the people all the time, and all of the people some of the time; but you cant fool all of the people all the time. 你可以一直愚弄一些人，甚至可以在某个时期愚弄所有的人；但不能一直愚弄所有的人 。
You cannot clap with one hand. 孤掌难鸣 。
You cannot have two forenoons in the same day. 一日之中不可能有两个上午 。
You cannot flay the same ox twice. 一头牛不能剥两次皮 。
You cannot judge a tree by its bark. 人不可貌相 。
You cannot make a crab walk straight. 江山易改，本性难移 。
You (or One) cannot make a silk purse out of a sows ear. 粗瓷碗雕不出细花来 。
You cannot sell the cow and sup the milk. 你不可能出售乳牛，同时又要喝牛奶 。
You can take a horse to the water but you cannot make him drink. 马到河边不喝水，逼马低头亦枉然 。(不要逼人做他不愿做的事)
You cant eat your cake and have it. 不能既要吃饼 ， 又要把饼保存 。
You cant make bricks without straw. 没有稻草 ， 制砖难搞 。
You cant make omelets (or omeletts) without breaking eggs. 有失才有得 。
You have no goats, and yet you sell kids. 你虽无老山羊 ， 却出卖小山羊 。
You make the failure complete when you stop strying. 不再努力之时，就是完全失败之日 。
You may force a man to shut his eyes, but you cannot make him sleep. 你可以迫人闭眼，但不能使他睡觉 。
You may go farther and fare worse. 一动不如一静 。
You may know the horse by his harness. 欲知马如何，可看套马索 。
You must not pledge your own health. 切不可把健康作孤注一掷 。
You must reap what you have sown. 种瓜得瓜 ， 种豆得豆 。
【英语谚语大全 英语谚语有哪些】You never know what you can do till you try. 事非经过不知难 。
