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1，since的用法這么用對(duì)嗎

since當(dāng)作因?yàn)橹v，外國人喜歡把since放在句首，在句中一般就用because了。你這句子前后因果很不明顯，很難理解，最好的因果明顯的句子用since.Student can really learn a lot from it after they start to think about this question.

原發(fā)布者:撲街的薔薇since的用法：譯作“自從…以來”(1)接時(shí)間點(diǎn)：如Ihavestayedinthatcountrysince1995.要求：謂v.用現(xiàn)在完成時(shí)，而且須是延續(xù)性動(dòng)詞。(2)接一段時(shí)間+ago：如Theyhavelivedinthathousesincetwoyearsago.要求：謂v.用現(xiàn)在完成時(shí)，而且須是延續(xù)性動(dòng)詞。(3)接時(shí)間狀語從句：如IhavelovedhersinceImetherlasttime./Lilyhasstayedathomesincesheleftschool.要求：主句的謂v.用現(xiàn)在完成時(shí)，而且須是延續(xù)性動(dòng)詞；從句的謂v.用一般過去時(shí)，而且須是終止性動(dòng)詞。(4)用于句型“Its/Ithasbeen+一段時(shí)間+since+時(shí)間狀語從句”中，譯作“自從…以來,已經(jīng)…(時(shí)間)了”。如Its/hasbeenthreemonthssincehemovedtothiscity.要求：主句的謂v.用一般現(xiàn)在時(shí)或現(xiàn)在完成時(shí)；從句的謂v.用一般過去時(shí)，而且須是終止性動(dòng)詞。(5)用于句型“一段時(shí)間+haspassedsince+時(shí)間狀語從句”中，譯作“自從…以來,…(時(shí)間)已經(jīng)過去了”。如上個(gè)例句還可寫成：Threemonthshaspassedsincehemovedtothiscity.要求：主句的謂v.用現(xiàn)在完成時(shí)，而且動(dòng)詞必須是haspassed；從句的謂v.用一般過去時(shí)，而且須是終止性動(dòng)詞。(6)注：當(dāng)since用于否定句時(shí)，主句的謂v.可以是終止性動(dòng)詞。如Hehasntseenthefilmsincelastmonth.(7)相關(guān)詞組：“從那時(shí)起”：eversince、sincethen、fromthenon.注：eversince作為一個(gè)詞組，放句尾可單獨(dú)使

since的用法這么用對(duì)嗎

2，關(guān)于 SINCE 的全部用法

since的用法：譯作“自從…以來” (1)接時(shí)間點(diǎn)：如 I have stayed in that country since 1995. 要求：謂v.用現(xiàn)在完成時(shí)，而且須是延續(xù)性動(dòng)詞。 (2)接一段時(shí)間 + ago：如 They have lived in that house since two years ago. 要求：謂v.用現(xiàn)在完成時(shí)，而且須是延續(xù)性動(dòng)詞。 (3)接時(shí)間狀語從句：如 I have loved her since I met her last time. / Lily has stayed at home since she left school. 要求：主句的謂v.用現(xiàn)在完成時(shí)，而且須是延續(xù)性動(dòng)詞；從句的謂v.用一般過去時(shí)，而且須是終止性動(dòng)詞。 (4)用于句型“Its / It has been + 一段時(shí)間 + since + 時(shí)間狀語從句”中，譯作“自從…以來, 已經(jīng)…(時(shí)間)了”。如 Its / has been three months since he moved to this city. 要求：主句的謂v.用一般現(xiàn)在時(shí)或現(xiàn)在完成時(shí)；從句的謂v.用一般過去時(shí)，而且須是終止性動(dòng)詞。 (5)用于句型“一段時(shí)間 + has passed since + 時(shí)間狀語從句”中，譯作“自從…以來, …(時(shí)間)已經(jīng)過去了”。如上個(gè)例句還可寫成：Three months has passed since he moved to this city. 要求：主句的謂v.用現(xiàn)在完成時(shí)，而且動(dòng)詞必須是has passed；從句的謂v.用一般過去時(shí)，而且須是終止性動(dòng)詞。 (6)注：當(dāng)since用于否定句時(shí)，主句的謂v.可以是終止性動(dòng)詞。如 He hasnt seen the film since last month. (7)相關(guān)詞組：“從那時(shí)起”：ever since、since then、from then on. 注：ever since作為一個(gè)詞組，放句尾可單獨(dú)使用。如I have given up smoking ever since. 另外，還可在since后接句子。since前加ever，只是加重語氣而已。如 I have given up smoking ever since I caught a bad cough. (8) since還可引導(dǎo)原因狀語從句，譯作“由于；因?yàn)椤保喈?dāng)于because。如 Since he was lazy, he didnt finish his homework.

關(guān)于 SINCE 的全部用法

3，介詞Since單詞的用法

網(wǎng)上有好多.1當(dāng)然講2現(xiàn)在完成時(shí)的標(biāo)志

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 havent 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。 Its been quite some time since I was last in London我離開倫敦已很長時(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 havent 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。試比較：1. Since Ive 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 didnt study English. Its two months since you didnt come to see me. 正確的說法為： Its a long time since he studied English 他好久沒學(xué)英語了。 You havent come to see me for two months. 你有兩個(gè)月沒來看我了。

用于現(xiàn)在完成時(shí)，引導(dǎo)原因狀語從句,as相似1。2.與because，表經(jīng)過稍加分析得出的原因.since+時(shí)間點(diǎn)

介詞Since單詞的用法