關(guān)于until的用法

　　Until用法：表示“直到……為止”,兩者�？蓳Q用,只是 until 比 till稍正式,所以在正式文體中,一般用 until,而在口語或非正式文體中則兩者都可用.從其后所接成分來看,till多與名詞或較短的從句連用,而較長較復(fù)雜的成分多用 until,位于句首時(shí)也多用 until.接下來就由小編帶來以下內(nèi)容，希望對你有所幫助！

　　連詞　conj. 直到…為止

　　up to the time when

　　· Ill wait until he arrives and then Ill leave.

　　我要等他來以后再離開.

　　· Go straight on untill you come to a large red building.

　　一直往前,走到一幢高大的紅色建筑物為止.

　　· Lets wait until the rain stops.

　　咱們等雨停吧.

　　· The teacher kept on asking the students questions until the bell rang.

　　老師反復(fù)向?qū)W生提問,直到下課鈴響.

　　連詞　conj. (在否定句中)在…之前

　　in (in negative constructions) before

　　· I shant do that until you come back.

　　在你回來之前,我不會(huì)干那件事.

　　· We wont come to any decision until we have had a chance to discuss the problem thoroughly.

　　我們有機(jī)會(huì)充分討論這個(gè)問題再?zèng)Q定下來.

　　· Until you told me I had no idea of it.

　　在你告訴我之前,我對此一無所知.

　　介詞　prep. 直到…為止

　　up to a certain time

　　· It was only a week until Christmas.

　　離圣誕節(jié)只有一個(gè)星期了.

　　· She will stay until Saturday.

　　她要一直呆到星期六.

　　介詞　prep. 在…之前;不到…(不)

　　before

　　· I cant come until tomorrow.

　　我得明天才能來.

　　· Not until noon did it stop raining.

　　直到中午雨才停止.

　　· Until then, I knew nothing at all about it.

　　在那以前,我對此一無所知.

　　· Until her fathers death, she had always lived in London.

　　在她父親去世之前,她一直住在倫敦.

　　　　not until用法

　　until可用作介詞或連詞,意為“到……時(shí)候?yàn)橹埂薄ⅰ暗健�…時(shí)候才”或“在……時(shí)候以前不”.什么情況下表達(dá)什么意思,關(guān)鍵要看(主)句中的謂語動(dòng)詞是終止性動(dòng)詞還是延續(xù)性動(dòng)詞.

　　1.如果(主)句中的謂語動(dòng)詞是終止性動(dòng)詞,應(yīng)采用“...not ...until ...”結(jié)構(gòu),意為“……到……時(shí)候才……”.例如：

　　You mustn’t eat anything until you see the doctor.

　　看過醫(yī)生之后,你才能吃東西.

　　Don’t get off the bus until it has stopped.

　　車停穩(wěn)了以后再下車.

　　2.如果(主)句中的謂語動(dòng)詞是延續(xù)性動(dòng)詞,那么謂語動(dòng)詞用肯定式或否定式,它們所表達(dá)的意思有所不同.

　　1) 如果謂語動(dòng)詞為肯定式,則until譯為“到……時(shí)候?yàn)橹埂?例如：

　　I watched TV until she came back.

　　我看電視一直看到她回來.

　　2) 如果謂語動(dòng)詞為否定式,則until應(yīng)譯為“到……時(shí)候才”,即“在……以前不”.例如：

　　I did not watch TV until she came back.(= I began to watch TV when/after she came back.)

　　直到她回來我才開始看電視.

　　3.用終止性動(dòng)詞作謂語時(shí),until既可以和not連用,又可以和never,nobody,nothing,few,little,seldom,hardly等含否定意義的詞連用.例如：

　　I had not seen him until 1990.(= I had never seen him until 1990.)

　　1990年以前我從未見過他.

　　Don’t put off until tomorrow what you can do today.(= Never put off what you can do today till tomorrow.)

　　今日事,今日畢.

　　4.連詞until引導(dǎo)的從句中謂語動(dòng)詞的時(shí)態(tài).

　　1) 主句的謂語動(dòng)詞為一般現(xiàn)在時(shí)或一般將來時(shí)時(shí),until從句中的謂語動(dòng)詞為現(xiàn)在完成時(shí),用來強(qiáng)調(diào)從句謂語動(dòng)詞表示的動(dòng)作發(fā)生在主句謂語動(dòng)詞表示的動(dòng)作之前.試比較：

　　I won’t go to bed until I have finished my homework.

　　我要完成作業(yè)才睡覺.

　　2) 主句中的謂語動(dòng)詞為一般過去時(shí)時(shí),從句中的謂語動(dòng)詞為過去完成時(shí),用來強(qiáng)調(diào)從句謂語動(dòng)詞的動(dòng)作發(fā)生在主句謂語動(dòng)詞表示的動(dòng)作之前.試比較：

　　Li Lei didn’t come until the film had begun.

　　直到電影開演,李雷才來.

　　〔特別提醒〕 till和until的意思基本相同,用法也基本一樣,但until語氣較重,多用于較正式的文體里.till多用于英式英語,until多用于美式英語; till不能用在句首,也不能用在not開頭的短語或從句里,而until可以.例如：

　　Until he came home,we knew the news.

　　在他到家之前,我們不知道這消息.

　　Not until nine o’clock yesterday evening did we finish the work.

　　直到昨晚九點(diǎn),我們才完成這項(xiàng)工作.

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