高考英語基礎(chǔ)知識練習(xí)連詞的講解與訓(xùn)練

1、連詞的講解與訓(xùn)練連詞知識要點 連詞是一種虛詞，用于連接單詞、短語、從句或句子，在句子中不單獨用作句子成分。連詞分為并列連詞和從屬連詞兩大類。并列連詞是連接主語與主語，謂語與謂語，句子與句子，分詞與分詞的詞等，它要求前后兩部分有相同的形式和語法作用；而從屬連詞一般連接主句與從句，從句形式有名詞性從句，定語從句和狀語從句等。種類作用舉例并列連詞用來連接詞與詞、詞組與詞組、分句與分句and（和），as well as（既又），both and（不但而且），not only but also（不但而且），not but（不是而是），neither nor（既不也不），either or（不是就是），o

2、r（或者），but （但是），yet（然而），for（因為），so（所以），while（而），when（這時）等。如：Both my brother and my sister are teachers./ His room is bright but mine is gloomy（暗沉沉的）.從屬連詞在復(fù)合句中引導(dǎo)從句引導(dǎo)時間狀語從句的：after, before, when, as, while, since, until, as soon as 引導(dǎo)原因狀語從句的：because, since, as, in that引導(dǎo)讓步狀語從句的：although, though, as, no

3、matter, even if (though)引導(dǎo)條件狀語從句的：if, unless, once, so (as) long as, on condition that引導(dǎo)結(jié)果狀語從句的：so that , such that 引導(dǎo)目的狀語從句的：so that , in order that 引導(dǎo)比較狀語從句的：as as , not so (as) as , than 引導(dǎo)方式狀語從句的：as if ,as though引導(dǎo)名詞性從句（即主語、賓語、表語、同位語從句）的連詞主要有：who,whose, when, how, where, why, that, whether, if等。

4、疑難突破 某些用法比較特殊的從屬連詞用法區(qū)別：once作副詞譯“曾經(jīng)”，作為連詞譯“一旦”，引導(dǎo)條件狀語從句相當(dāng)于if的加強(qiáng)形式。例如：I don't believe he was once a thief. (once是副詞)Once Aristotle had made up his mind that heavy objects always fell faster than light objects, he taught it as a truth to his students. (once是連詞)till, until作為介詞式從屬連詞引導(dǎo)時間狀語短語或狀語從句用于否定句

5、時，結(jié)構(gòu)為not until (till)，主句謂語動詞延續(xù)與非延續(xù)皆可，意為“直到才”。用于肯定句時，只與延續(xù)性動詞連用，表示“到為止”。如：They played volleyball until (till) it got dark./ They didn't talk（延續(xù)性動詞）until (till) the interpreter（譯員）came./ He didn't go to bed（非延續(xù)性動詞）until (till) the his father came back.；until可以放在句首，till則不行，如：Until the last minut

6、e of the match we kept on playing./ Not until he finished his work did he go home.（倒裝）；till, until只用于時間，以下句子是錯誤的：We walked till the edge of the forest.（要用as far as或to）。as作從屬連詞可引導(dǎo)多種狀語從句as引導(dǎo)時間狀語從句，意為“當(dāng)時”。如：As (he was) a young man, he was a storekeeper and later a postmaster./ He sang as he worked. as引

7、導(dǎo)方式狀語從句，意為“象一樣”。如：We must do as the Party teaches us.as引導(dǎo)原因狀語從句。意為“由于”，如：As you are tired, you had better have a rest.as引導(dǎo)讓步狀語從句。意為“雖然”、“盡管”。如：Child as he is, he can do it well. ( = Although he is a child, he can do it well.) 另外，as做為關(guān)系代詞還可以引導(dǎo)定語從句，如：I have the same book as you.because, since, as引導(dǎo)原因狀

8、語時注意使用上的區(qū)別.如果原因構(gòu)成句子的最主要部分,一般用because ,因此because引導(dǎo)的從句往往放在句末。用why提問的句子，一定用because回答。如：He had to stay at home yesterday because he was ill.；如原因已為人們所知，或不如句子的其他部分重要，就用as，或 since。since比as更正式些。as和since引導(dǎo)的從句一般放在句子的開頭。如：As you are tired, you had better rest./ Since everyone is here, now let's begin.altho

9、ugh和though引導(dǎo)讓步狀語從句往往用法一樣，但注意以下區(qū)別although用于各種文體，而though則多用于非正式的口語或書面語中。注意由although, though引導(dǎo)的從句后，主句不能用but，但可用副詞yet, still。如：Although/ Though it rained all the morning, they still went on working.（或yet they went on working）though常與even連用，even though表示強(qiáng)調(diào)，意為"即使"，但不能說even although，例如：Even thoug

10、h I didn't understand a word, I kept smiling. though可用作副詞，意為"然而"，常用逗號與句子分開。although則不能這樣使用，它只作連詞。例如：It was a quiet party, I had a good time, though. 當(dāng)while, when, as引導(dǎo)時間狀語從句時的區(qū)別while引導(dǎo)的狀語從句中動詞必須是持續(xù)性。謂語動詞多為進(jìn)行時，或狀態(tài)動詞的一般時。while 的這些用法可用when代替，等于 "at the time that", "during t

11、he time that"。如：Please keep quiet while (when) others are studying； when除可指一段時間外，還可用來指一點時間，等于 "at the time"，也就是說when引出的時間狀語從句中的謂語動詞可以是終止性的，也可以延續(xù)性的。因此主句和從句的謂語可以是一般時、進(jìn)行時或完成時。如：When I went into the room, he was writing an article.（when不能換成while）He often makes mistakes when he is learning

12、 Chinese“gongfu”.（when可換成while）as?？膳cwhen，while通用，但強(qiáng)調(diào)"一邊、一邊"。例如：As (when, while) I was walking down the street, I noticed a police car in front of number 37. when引導(dǎo)的狀語從句中的主語與主句主語一致，主、謂是"主語+系動詞"結(jié)構(gòu)時，這時主語和系動詞可以省略。例如：When (he was) young, he worked for a rich man./ She'll be here t

13、o give you help when (if it is) necessary. when有時代替if，引導(dǎo)條件句，意為"如果"、"假如"，例如：I'll come when (if) I'm free.unless引導(dǎo)條件狀語從句等于if not 。例如：He'll accept the job unless the salary is too low. ( = He'll accept the job if the salary is not too low.)在用as if引導(dǎo)的方式狀語從句及表語從句中，根據(jù)情況

14、要使用虛擬語氣例如：He talks as if he knew all about it. 但有時也可用直陳語氣。例如：It looks as if it is going to rain.whether, if引導(dǎo)從句的用法區(qū)別引導(dǎo)主語從句、表語從句或同位語從句時，用whether，不用if。例如：Whether they will go to the Great Wall is not known./ The question is whether we can finish the task on time./ The question whether we will take par

15、t in the physics contest has not been decided. whether可接不定式，而if則不可。例如：I haven't decided whether to leave or not. whether可作介詞的賓語或置于句首表示強(qiáng)調(diào)，而if則不可。例如：Everything depends on whether we have enough money./ Whether he will come, I am not sure. whether和 if均可引導(dǎo)賓語從句， whether引導(dǎo)的賓語從句一般都是肯定句，if引導(dǎo)的賓語從句可以是肯定的，

16、也可以是否定的（此時不能用whether），例如：Could you tell us whether/ if it rains in winter in Australia?/ I wonder if it doesn't rain. 引導(dǎo)賓語從句的whether和if?？膳cor not連用。連用時要注意or not的位置，它一般與 whether、if分開使用，有時它可與whether合起來使用，但不能與if合起來使用。例如：I don't know whether/ if they will come or not./ I don't know whether or

17、 not they will come.if可用來引導(dǎo)條件狀語從句，譯"如果"，whether則不行。例如：If you work hard, you are sure to succeed.before作連詞一般表示時間，意為"在之前"，但有些句子中這樣譯就顯得別扭試看以下句子的翻譯：He almost knocked me down before he saw me.他幾乎把我撞倒才看見我；Before I could get in a word he had measured me.我還沒來得及插話，他已經(jīng)給我量好了尺寸。注意：命題熱點在于句子銜接

18、。即在詞與詞、句與句之間使用并列或從屬連詞。尤其是一個連詞的多種用法的準(zhǔn)確把握和引導(dǎo)從句時的靈活運(yùn)用。即學(xué)即練1. I wonder how much you charge for your services. The first two are free the third costs $30. A. while B. untilC. when D. before2.John plays basketball well, _his favorite sport is badminton.A. so B. or C. yet D. for3. You may use the room as y

19、ou like _ you clean it up afterwards. A. so far as B. so long as C. in case D. even if4. At first he hated the new job but decided to give himself a few months to see_ it got any better. A. when B. how C. why D. if5. _ the police thought he was the most likely one, since they had no exact proof abou

20、t it, they could not arrest him. A. Although B. As long asC. If only D. As soon as6. shall we have our picnic tomorrow?_it doesnt rain. A. Until B. While C. Once D. If7.Owen wouldnt eat anything _ he cooked it himself.A. until B. since C. unless D. while8.The medicine works more effectively _ you drink some hot water after taking it. A. asB. until C. although D. if連詞即學(xué)即練1.A。while表示轉(zhuǎn)折（含前后對比）。2.C。考查并列句。前半句是說約翰籃球打得很好，后半句是說約翰最喜歡的運(yùn)