It‘s/has been +一段时间+since从句 自从某时起做某件事情已经...，since,been,it‘s,单词记忆法、语法用法，与since,been,it‘s, 相关例句、名人名言

since单词相关例句：

I have long since abandoned the notion that higher education is essential to  either success or happiness. Hot houses of learning do not always grow anything edible.Robert Moses, American state govenment officer——我早已抛弃了这种观念：高等教育是通往成功或者幸福的必由之路。知识的“温室”并不总能生长可供食物用的粮食。美国州政府官员  摩西  R
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
Be not angry that you cannot make others as you wish them to be, since you cannot  make yourself as you wish to be.Thomas Mann, German writer——不要由于别人不能成为你所希望的人而愤怒，因为你自己也不能成为自己所希望的人。德国作家  托马斯·曼

The United States is a republic, since its citizens elect people to represent it.
美国是共和制，因为每个公民都能选人去代表他们。


I'm lame since my accident; I need the help of my arms to walk.
事故之后我就瘸了，我需要手来帮助我走路。


Primitive men made fire by themselves since they had no electricity.
原始人不能用电，只能自己生火。


Ever since she started her diet, she has had a very slim figure.
她的身材自从节食开始就很苗条了。


Great changes have taken place in China since the introduction of the reform and opening policy .
改革开放以来，中国发生了巨大的变化。


They greet each other out of manners, since they are just acquaintances.
他们招呼对方是出于礼貌，因为他们只是泛泛之交。


I like the white sheet since it looks clean.
我喜欢这个白床单，因为它看起来很干净。

been单词相关例句：

We should put aside and postpone all other reforms; that we  have but one task-----the istruction of the people, the diffusion of education, the ecourgement of science----on that day a great step will have then been taken in our rgenerion.Leon Gambetta, French educator——我 们应该把一切改革先放下。我们只有 一项任务，就是教育人民，普及知识、倡导科学。这一天到来之时，便是我们振国兴邦之日。法国教育  爱甘必大  L
Politics, as a pracitice, whatever its professions , has always been the systematic organization of hatreds.——Adams Henry, American historian 政治作为一种实践，不管它如何表白，始终是有条不紊的煸动仇恨的组织。美国历史学家 享利.A.
Oh, I am not going to die , am I ? He will not separate us , we have been so happy.——Charlotte Bronta, American writer 哦，我不会死，是吗？它不会使我们分离，我们是多么幸福啊。美国作家 布恩塔 C
No man can be a good ruler unless he has first been ruled. 没受过他人的统治，就不能很好地统治他人。
The paramount duty of Congress is to stop deficiencies by the restoration of that protective legislation which has always been the firmst prop of the Treasury.——William Mckinley, American president 国会的最高职责是恢复始终是国家财政最坚实支柱的保护性立法，以制止财政赤字。美国总统 科金利.W.
But has the last word been said ? Is all hope to be lost ? Is the defeat final No !(Charles De Gaulle , French president )——但是难道败局已定，胜利已经无望？不，不能这样说！ (法国总统 戴高乐. C.)
O liberty, how many crimes have been committed in thy name! 自由啊！假你的名义犯了多少罪啊！
Nothing great in the world has been accomplished without passion. (Hegel George Wilhelm)——  这个世界上要是没有热情是不可能完成伟大事业的。（黑格儿 G*W）
The ideals which have lighted my way , and time after time have given me new courage to face life cheerfully 19 have been kindness , beauty and truth .(Albert Einstein , American scientist)  有些理想曾为我们引过道路，并不断给我新的勇气以欣然面对人生，那些理想就是--真、善、美。 (美国科学家 爱因斯坦 . A .)
A politician is a man who undertands government, and it takes a poiltician to run a government. A statesman is a politician who's been dead ten or fifeen years.——H.S.Turman, American president  政客是政府的人，管理政府需要政客，政治家是已死去十至十五年的政客。美国总统 杜鲁门.H.S.