if， whether引导的名词从句，if,单词记忆法、语法用法，与if, 相关例句、名人名言

if单词相关例句：

Freedom is the freedom to say that two plus two makes four. If that is granted, all else follows.——Ceorge Eric Blair Orwell.British novelist  自由是指人们有说“2+2=4”的自由，有了这一保证，其他一切便会随之而来。英国小说家奥韦尔 .G.E.B.  
No one can degrade us except ourselves; that if we are worthy, no influence can defeat us.——B.T.Washington, American educator除了我们自己以外，没有人能贬低我们。如果我们坚强，就没有什么不良影响能够打败我们。美国教育家   华盛顿 B T
If it is not right, do not do it; if it is not true, do not say it. (If it is not broken, do not fix it.) 不正确的事不做，不真实的话不说。
I hate to see things done by halves. -- If it be right, do it boldly, --if it be wrong, leave it undone. 事情不要做一半；对的，就做下去，不对，就丢开。
Industry if fortune's right hand, and frugality her left. 勤勉是幸福的右手，节俭是幸福的左手。
Speak clearly if you speak at all, Carve every word before you let it fall. 要说就索性说得一清二楚，说出前每句话要字斟句酌。
If Enterprise is afoot, wealth accumulates whatever may be happening to Thrift; and if Enterprise is asleep, wealth decays, whatever Thrift may be doing.John  Maynard  keynes British  economist如果企业在进展，不论节俭不节俭，财富也在衰落。国经济学家  凯恩斯 .J.M.
The laws of Nature, that is to say the laws of God, plainly made every human being a law unto himself, we must steadfastly refuse to obey those laws, and we must as steadfastly stand by the conventions which ignore them , since the statutes furnish us peace, fairly good government and  stability, and therefore are better for us than the laws of God, which would soon  plunge us into confusion and disorder and anarchy if we should adopt them.Mark Twain, American  writer自然法即神灵法，只是用来约束每一个个体的法律，我们必须坚定地拒绝遵守。我们应该坚定地遵守忽视神灵法的规章制度，因为规章制度赋予我们和平、比较好的政府和稳定，因而对我们来说，规章制度比神灵法更好，因为如果我们采用神灵法的话，他会将我们陷入迷惑、无序和无政府状态。美国作家   马克·吐温A
If you are too fortunate, you will not know yourself; if you are too unfortunate, nobody will know you. 运气太好，得意忘形；运气太坏，无人理会。
Man loves company even if it is only that of a small burning candle. 人喜欢伴侣,哪怕只是一根点着的小蜡烛也好.