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,語法精講系列,講座四 狀語從句,,[考點一] 常考查的九類狀語從句 一、時間狀語從句 1．when，while，as (1)①when既可引導一個持續(xù)性動作，也可引導一個短暫性動作，可用于主句動作和從句動作同時發(fā)生，也可用于從句動作先于主句動作發(fā)生。如： When I lived there，I used to go to the seashore on Sundays. 我住在那里時，星期天常到海濱去。 When the film ended，the people went back. 電影一結(jié)束，看電影的人便回去了。,②when還可表原因，意為“既然”。 It was foolish of you to take a taxi when you could easily walk there in five minutes. 既然你五分鐘就可以走到那兒，可你還打的去，真的太傻了。 (2)從屬連詞while引導的動作必須是持續(xù)性的，側(cè)重主句動作和從句動作相對比。如： Please don't talk so loud while others are working. 別人在工作時請別那么大聲談話。 Father was cleaning the car while I was doing my homework. 我在做作業(yè)時，爸爸在洗車。,(3)as引導時間狀語從句，意為“正當；一邊……一邊……；隨著”等意思，表示兩個動作同時發(fā)生。 As she sang，tears ran down her cheeks. 她一邊唱歌，眼淚一邊從臉頰流下。 As time goes on，it's getting warmer and warmer. 隨著時間的推移，天氣變得越來越暖和了。,2．a(chǎn)s soon as，immediately，directly，instantly，the moment，the minute，the instant和once(一……就……) 這些從屬連詞引導的從句都表示從句的動作一發(fā)生，主句的動作隨即發(fā)生，常譯為“一……就……”。從句中用一般時態(tài)代替將來時態(tài)。如： The moment I heard the voice，I knew my father was coming. 一聽到那個聲音，我就知道父親來了。 The boy burst into tears immediately he saw his mother. 那個男孩一見到他媽媽便放聲大哭。,3．till，until和 not.until (1)肯定句：主句的謂語動詞必須是延續(xù)性動詞，主句、從句都為肯定式，意為“某動作一直延續(xù)到某時間點才停止”。如： He remained there until/till she arrived. 他在那兒一直待到她來。 You may stay here until/till the rain stops. 你可以在這里待到雨停。 (2)否定句：主句的謂語動詞必須是非延續(xù)性動詞，從句為肯定式，意為“某動作直到某時間才開始”。如： He won't go to bed till/until she returns. 直到她回來他才睡。,4．before和since (1)若表達“還未……就……；不到……就……；……才……；還沒來得及……就……”時，需用連詞before。如： We had sailed four days and four nights before we saw land. 我們航行了4天4夜才看到陸地。 We hadn't run a mile before he felt tired. 我們跑了還不到一英里他就累了。 Before I could get in a word，he had measured me. 我還沒來得及插話，他就給我量好了尺寸。,(2)before從句中謂語不用否定式。如： Before they reached the station，the train had gone. 他們到火車站前(他們還沒到火車站)，火車就已開走了。 (3)It will be＋一段時間＋before.，表示“還要多久才……”，如： It will be half a year before I come back. 半年后我才能回來。 It won't be long before we meet again. 過不了多長時間我們就會再見面了。,(4)since從句的謂語動詞一般是非延續(xù)性動詞，主句的謂語動詞是延續(xù)性的或者是反復發(fā)生過的動作。since從句的時態(tài)若是一般過去時，主句中的時態(tài)常是現(xiàn)在完成時或現(xiàn)在完成進行時。如： I have written home four times since I came here. 自從我來到這兒，我已經(jīng)給家里寫過四封信了。 (5)在“It is＋一段時間＋ since從句”句型中，since引導的從句的謂語動詞若是持續(xù)性動詞，常理解為某一狀態(tài)的終止；若是終止性動詞，則理解為某一動作的開始。如：,It is three years since the war broke out.(終止性動詞) 自戰(zhàn)爭爆發(fā)以來已有三年了。 It is three years since I smoked a cigar(＝since I stopped smoking a cigar)．(持續(xù)性動詞) 我不吸煙已有三年了。 如果譯成“我吸煙已有三年了”，應(yīng)為：It is three years since I began to smoke.(終止性動詞),5．every time，each time，next time，the last time，any time等名詞短語用來引導時間狀語從句，表示“每當……；每次……；下次……”等。如： Every/Each time I was in trouble，he would come to help me out. 每當我處于困境，他就會來幫助我。 Next time you come，do remember to bring your son here. 下次你來這里的時候，一定記著把你兒子帶來。 The last time she saw James，he was lying in bed. 上次她看見詹姆斯的時候，他正躺在床上。,二、地點狀語從句 1．引導地點狀語從句的從屬連詞where，wherever指具體地點時，從句可用于主句之前或之后；表示抽象條件的含義時，從句需放在主句之前。如： We should go where the Party needs us most. 我們應(yīng)到黨最需要我們的地方去。 You are free to go wherever you like. 你愿意去哪里就去哪里。 Where there is a will，there is a way. 有志者，事竟成。 Where there is smoke，there is fire. 無火不生煙。/無風不起浪。,2．注意區(qū)分where引導的定語從句與狀語從句。 where引導地點狀語從句直接修飾動詞，而在定語從句中where作為關(guān)系副詞要跟在表示地點的先行詞后面。 You'd better make a mark where you have any questions.(狀語從句) You'd better make a mark at the place where you have any questions.(定語從句) 你最好在有問題的地方做一下標記。,三、原因狀語從句 原因狀語從句通常由because，since，as，now that，seeing(that)，considering that等引導。 I was absent from the meeting because I was ill. 因為我病了，所以我開會缺席了。 As it is raining，we shall not go to the park. 由于在下雨，我們不去公園了。 Now that/Since everybody is here，let's begin our meeting. 既然大家都在這里，我們開始開會吧。 Considering that I have told you three times，you must know it. 鑒于我已經(jīng)告訴你三次了，你一定知道它。,四、目的狀語從句 引導目的狀語從句的從屬連詞有：so that，in order that，for fear that，in case等。 1．in order that，so that 兩個連詞都意為“以便……；為了……”，它們引導的狀語從句中常用情態(tài)動詞。in order that比so that正式，引導的狀語從句可置于主句之前或之后，而so that引導的從句只能置于主句之后。如： I'll speak slowly so that you can understand me. 我會慢慢說，以便你能懂。 In order that we might see the sunrise，we started for the peak early. 為了能看到日出，我們很早就出發(fā)去了山頂。,2．for fear that，in case 引導目的狀語從句時，for fear that表示“害怕，擔心某事會發(fā)生”；in case(that)表示“以防出現(xiàn)某種情況”。如： Mary didn't want to get out of bed，for fear that she might wake her baby(up)． 瑪麗不想起床，擔心吵醒她的寶寶。 Take your raincoat，in case it rains. 帶上雨衣吧，以防下雨。,如： Mike is such an honest worker that we all believe in him. ＝Mike is so honest a worker that we all believe in him. 邁克是一個如此誠實的工人，以至于我們都相信他。 2．除結(jié)果狀語從句外，too.to.(太……而不能……)，enough to.(達到某種程度可以……)等不定式結(jié)構(gòu)同樣可以表示結(jié)果。如： He didn't get up early enough to catch the bus. ＝He got up too late to catch the bus. 他起床太晚了，沒有趕上那班公共汽車。,六、條件狀語從句 引導條件狀語從句的從屬連詞有：if，unless(＝if.not如果不；除非……否則……)，so/as long as(只要)，in case(萬一)，on condition that(條件是)，suppose/supposing(that)(假設(shè)，如果)，provided that(如果)等。如： You'll fail the exam unless you study hard(＝if you don't study hard)． 除非你努力學習，否則你考試會不及格。 As long as you don't lose heart，you will succeed. 你只要不灰心就會成功。,Suppose/Supposing(that) they refuse us，who else can we turn to for help? 假如他們拒絕了我們，我們還能求助于誰？ You can go swimming on condition that you don't go too far from the river bank. 只有不離河岸太遠你才能下去游泳。,七、方式狀語從句 引導方式狀語從句的從屬連詞有：as，as if，as though等。方式狀語從句應(yīng)放在主句之后。其中as if或as though引導的從句一般用虛擬語氣，但如果從句中所陳述的情況很可能實現(xiàn)，也可用陳述語氣。如： Do as you are told to，or you'll be fired. 告訴你怎么做你就怎么做，否則你會被解雇。 The old lady treats the boy as if he were her own son.(虛擬語氣) 這位老太太對待這個男孩就像他是她自己的兒子似的。 I feel as if I have a fever.(陳述語氣) 我感覺好像發(fā)燒了。,八、讓步狀語從句 1．a(chǎn)lthough/though(盡管，雖然)，even though/even if(即使)引導讓步狀語從句。although與though兩者意思相同，一般可互換，都可以與yet，still或nevertheless連用，但不能和but連用。如： He is unhappy，though/although he has a lot of money. 雖然他很有錢，但他并不幸福。 Although/Though it was raining hard，yet they went on playing football. 雖然雨下得很大，但他們還是繼續(xù)踢足球。 Even though/if it is raining，we'll go there.(陳述語氣) 即使下雨，我們也要去那里。 Even if I were busy，I would go.(虛擬語氣) 即使忙，我也要去。,特別注意：though還可用作副詞，意為“可是，然而”，置于句末。如： He said he would come；he didn't，though. 他說他會來，可是沒有來。 2．whether.or.(不管……還是……)；疑問詞＋ -ever與no matter＋疑問詞(不管……；無論……)引導讓步狀語從句。如： Whether you believe it or not，it is true. 不管你相信與否，那都是真的。 Whoever you are(＝No matter who you are)，you must obey the rules. 無論你是誰，你都要遵守規(guī)則。,3．when，while也可作從屬連詞表讓步，while常用在句首，when常用在句中，相當于although。如： Suddenly，she stopped when she ought to have continued. 盡管她應(yīng)該繼續(xù)下去，她卻突然停住了。 While I admit that there are problems，I don't agree that they cannot be solved. 盡管我承認有問題存在，但我不同意說這些問題不能解決。,九、比較狀語從句 1．a(chǎn)s.as；not so/as.as；the same.as；such.as 連詞表示同程度級的比較，肯定句用as.as，否定句可用not as.as或not so.as。如： He doesn't run so (as) fast as Jack (does)． 他跑得不如杰克快。 Henry is not such a good worker as Peter. 亨利不是一個像彼得這樣的好工人。 2．than表示不同程度的比較，主句中用形容詞或副詞的比較級。如： He runs less fast than me. 他跑得不如我快。,[考點二] 狀語從句的幾種重要句式 1．not until.句型的強調(diào)和倒裝用法。如： It was not until you told me that I had any idea of it.(強調(diào)句型) Not until you told me did I have any idea of it.(not until置于句首，主句要部分倒裝) 直到你告訴我，我才知道這件事。,3．在so/such.that.句型中當so或such置于句首時，主句要用倒裝語序。如： So clever a student was he that he was able to work out all the difficult problems. 他是如此聰明的一個學生，以至于成功地解出了所有難題。 4．a(chǎn)s引導的讓步狀語從句須用倒裝，句型為：adj./adv./n.(一般不帶冠詞)/v.(原形)＋as＋主語＋謂語。 Angry as/though he was，he managed to speak calmly. 盡管他很生氣，他還是設(shè)法讓自己平靜地講話。,5．在時間、條件、方式、讓步狀語從句中，如果從句的主語和主句主語一致或從句的主語為it而且從句的謂語又包含be，就可以省略從句中的“主語＋ be”部分，構(gòu)成下列結(jié)構(gòu)： (1)連詞＋分詞 Look out while crossing the street. 穿過街道時要小心。 (2)連詞＋形容詞 Come tomorrow if possible. 如果可能的話明天來。,(3)連詞＋介詞短語 While in Beijing，I paid a visit to the Great Wall. 在北京的時候，我參觀了長城。 (4)連詞＋不定式 He cleared his throat as if to say something. 他清了清嗓子好像要說些什么。,