一：1ever since you left me自從你離開了我
　　i've been try to hide the pain.我一直在掩飾內(nèi)心的傷痛
　　用法,一般就是可用在句首,自從的意思.
　　2主句用現(xiàn)在完成時(shí),從句用一般過去時(shí)
　　eg.Ever since he moved to London,i haven`t seen him.
　　ever since用在句尾時(shí),所表達(dá)的時(shí)間應(yīng)在上文中交待出來或是聽話者知道的那個(gè)時(shí)間:"就從那時(shí)起,一直到現(xiàn)在"
　　二：since的用法主要有兩點(diǎn)：一是表示“自從……以來”,二是表示“既然”之意.但如果只了解詞的含義,而不了解其用法,在使用時(shí)就會(huì)造成錯(cuò)誤.例如：I have not heard from him since I lived in Shanghai.
　　不少人會(huì)望文生義,將該句譯為：“自從我住在上海以來,就再也沒有收到他的信了.”而實(shí)際上這個(gè)句子的譯文并非如此,那么正確的含義是什么呢?
　　下面談?wù)剆ince作連詞引導(dǎo)時(shí)間狀語從句的用法.
　　一、若since引導(dǎo)的狀語從句的謂語動(dòng)詞是終止性的過去時(shí),則從句表示的時(shí)間是“從動(dòng)作開始的那一時(shí)刻起”.如：
　　He has studied very hard since he came to our school.自從他來到我們學(xué)校,他學(xué)習(xí)就非常努力.
　　We have been missing them since they left here自從他們離開這里,我們就一直很想念他們.
　　這是最常見的一種用法,此處不再多述.
　　二、若since引導(dǎo)的狀語從句的謂語動(dòng)詞是持續(xù)性動(dòng)詞或表示狀態(tài)的動(dòng)詞的過去時(shí)時(shí),則從句表示的時(shí)間是“從那持續(xù)動(dòng)作或狀態(tài)結(jié)束時(shí)算起”.如：
　　I haven’t heard any noise since I slept.Sleep 為持續(xù)性動(dòng)詞,sleep的動(dòng)作結(jié)束時(shí),即“醒來”時(shí),這句應(yīng)譯為“我醒后還未聽到任何聲音”.
　　John is now with his parents in New York,it is already three years since he was a teacher約翰現(xiàn)在和父母一起住在紐約,他不當(dāng)教師已經(jīng)三年了.
　　本文開始出現(xiàn)的那個(gè)句子就可以譯為“自從我離開上海,就再也沒有收到他的信.”這種譯法常被人們誤用,我們不妨再多舉幾個(gè)例子看看：
　　How long is it since you lived in Shanghai?你離開（沒住在）上海多久了?
　　It is half a month since he was a League member.他退團(tuán)（不當(dāng)團(tuán)員）半個(gè)月了.
　　It’s been quite some time since I was last in London我離開倫敦已很長(zhǎng)時(shí)間了.
　　比較：He has written to me frequently since I was ill.自從我病愈以來,他屢次給我寫信.（從句謂語為狀態(tài)動(dòng)詞）
　　He has written to me frequently since I fell ill.自從我生病以來,他就屢次給我寫信.（從句謂語為終止性動(dòng)詞）
　　三、若since引導(dǎo)的狀語從句的謂語為持續(xù)性動(dòng)詞的現(xiàn)在完成時(shí),則表示動(dòng)作和狀態(tài)延續(xù)到現(xiàn)在（說話時(shí)刻）,其表示的時(shí)間的起點(diǎn)應(yīng)從動(dòng)作發(fā)生之時(shí)算起.如：
　　I haven’t heard from him since he has lived there.
　　這里has lived表示動(dòng)作的持續(xù)性,時(shí)間的起點(diǎn)應(yīng)從：“開始居住”時(shí)算起.因此此句可理解為“自從他（開始）住在那兒起,我就一直沒收到他的來信”.
　　Since we have owned a car,we have gone camping every year.自從我們自己有了汽車,我們每年都去野營(yíng).
　　試比較：1.Since I’ve been at this school,we have had three headmasters.自從我到這所學(xué)校,我們已換了三個(gè)校長(zhǎng)了.
　　Since I was at this school,they have had three headmasters.自從我離開這所學(xué)校,他們已換了三個(gè)校長(zhǎng)了.
　　2.He has never been to see me since I have been ill.自從我生病以來,他從未來看過我.
　　He has never been to see me since I was ill.自從我病愈以來,他從未來看過我.
　　由此可見,since引導(dǎo)的從句持續(xù)動(dòng)詞的一般過去時(shí)和現(xiàn)在完成時(shí)所表示的意思恰好相反.換言之,前者以肯定的語法形式反映著否定的邏輯內(nèi)容,而后者的形式與內(nèi)容是一致的.
　　至于It is +一段時(shí)間+since…的句型與It has been +一段時(shí)間+since…意思相同.前者是規(guī)范說法,后者是口語說法.
　　應(yīng)注意的是,在這種結(jié)構(gòu)中,since引導(dǎo)的從句絕對(duì)不能用否定式的謂語動(dòng)詞來表示否定意義,下面兩句都錯(cuò)了：
　　It is a long time since he didn’t study English.
　　It’s two months since you didn’t come to see me.
　　正確的說法為：
　　It’s a long time since he studied English 他好久沒學(xué)英語了.
　　You haven’t come to see me for two months.你有兩個(gè)月沒來看我了