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1、中考英語語法:狀語從句一、時間狀語從句在時間狀語從句中,通常要用動詞的一般現(xiàn)在時態(tài)表示將來時,用一般過去時表示過去將來式。時間狀語從句常用連詞有: when, as, while, whenever, after, before, till (until), since, once, as soon as (或the moment ), by the time, no sooner than, hardly (scarcely) when, every time等引導。1 考查when, while, as引導,表示“當時候”.【考例】一Mum,_shall we have lunch? We
2、 will have it when your dad_. 07連云港市A when;returns B where returns Cwhere;will return Dwhen;will return答案A解析 答語中when引導了一個時間狀語從句,主句用了一般將來時態(tài),所以從句用一般現(xiàn)在時態(tài),可見正確答案在A與B之中。既然答語用了時間狀語來回答,可見問句詢問的也一定是時間,從而確定正確答案為A。2. before 的用法:before的本意為“在之前”,根據(jù)具體語境還可理解為“還沒來得及/還沒有就,趁著還沒就,不知不覺就,才”等。如:【考例】Could you please give
3、me your e-mail address _you go? 昆明市A. as soon as B. before C. after D. until答案B解析這四個詞(組)都可以引導時間狀語從句,as soon as一就before在之前;after在之后;until直到才。分析句子可以看出句意為“在你走之前把你的電子郵件地址給我好嗎?”2until 和till 的用法:與肯定式的主句連用,主句謂語必須是延續(xù)性動詞,till/ until表示“直到”;與否定式的主句連用,且主句謂語是非延緩性動詞時,till/ until表示“直到才”。其強調(diào)句型為“notuntil” ,位于句首時要采用倒
4、裝形式。如:【考例】一Hurry upThe bus is comingOh。noWe mustnt cross the street _the traffic lights are green福州市A after B since C while Duntil 答案D 解析本題應(yīng)從句意人手。until常用于否定句中,構(gòu)成notuntil結(jié)構(gòu),意為“直到才”,該句意為“直到交通燈變綠,我們才能穿過馬路”。The kids didnt start to fly kites in the playground _the rain stopped. 成都市A. if B. until C. whene
5、ver答案B解析 notuntil直到才。“直到雨停孩子們才可以去操場放風箏”,-Look! Here comes our school bus. -No hurry. Dont get on it _it has stopped. 安徽省A. until B. after C. since D. whenA解析句中有dont,可想notuntil為固定結(jié)構(gòu),意為“直到才”。二、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),as/so long as ,while(=as long as 只要),supposing(that),provided/p
6、roviding(that),in case(假使),on condition that(在的條件下)等。如:【考例】_you go to bed earlier, you wont feel tired in the mornings沈陽市A Unless B Because CIf DWhen答案C 解析考查if引導的條件狀語從句?!凹偃缒阍缫稽c上床睡覺,那么你在上午就不會感到累?!盰ou wont pass your exams _ you work harder. 廣東省 A. when B. if C. unless D. after答案C 解析when,after一引導的是時間狀語
7、從句,不合題意;if,unless引導的是條件狀語從句,If不合句意,“除非你更加努力地學習,否則,你不會通過考試”。故用unless。三、讓步狀語從句用來引導讓步地點狀語從句的從屬連詞有:though,although,even ifthough, while(雖然、盡管),for a11(that)(盡管)whetheror(不論不管還是)以及“疑問詞+ever(whatever,wherever,whoever,however,)”和 “no matter +疑問詞”等。 【考例】Shall we go on working? Yes , I prefer to have a rest
8、. (2004江西省南昌) Awhen BifCbecause Dthough答案: D命題立意:本題考查從屬連詞引導讓步狀語從句的用法。試題解析:依據(jù)上句:我們繼續(xù)工作嗎?是的,盡管我想休息會。Edison never gave up, he failed many times. (2004四川)AandBthoughCor答案: B命題立意:本題考查從屬連詞引導讓步狀語從句的用法。試題解析:依據(jù)題意:即使愛迪生失敗多次,他也決不放棄。though用來引導讓步狀語從句。故選B。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 (為了,以便);in
9、case(以防,以免),lest(免得,以防),for fear that(以免,惟恐)等。從句中一般含有can , could, may,might ,will, would等情態(tài)動詞。如:【考例】一More and more people in Beijing are learning English _they can better serve the 2008 0lympic Games一Im sure they will宜昌市Abecause of B so that Ceven though Das if答案B解析 本題也應(yīng)從句意人手。越來越多的人學習英語,“為的是”能更多更好地為
10、奧運服務(wù)。so that引導一個目的狀語從句。五、結(jié)果狀語從句【考例】The camera is expensive I cant afford it. (2004遼寧本溪)A. so, that B. such, that C. so, as to D. enough, that答案: A命題立意:本題考查從屬連詞引導結(jié)果狀語從句的用法。試題解析:依據(jù)題意:這照相機太貴以致我買不起。expensive為形容詞,sothat句中要用形容詞或副詞;suchthat要用形容詞修飾名詞。其他兩項不能引起從句。故選A?!菊Z法回顧】狀語從句的分類。1. 時間狀語從句用法要點。(1)as、when、whi
11、le用法一覽表。類別作 用例 句asas表示“當?shù)臅r候”,往往和when/ while通用,但它著重強調(diào)主句與從句的動作或事情同時或幾乎同時發(fā)生。She came up as I was cooking.(同時)The runners started as the gun went off.(幾乎同時)when(at or during the time that )既可以表示在某一點的時候,又可表示在某一段時間內(nèi),主句與從句的動作或事情可以同時發(fā)生也可以先后發(fā)生。It was raining when we arrived.(指時間點)When we were at school, we w
12、ent to the library every day.(在一段時間內(nèi))whilewhile意思是“當?shù)臅r候”或“在某一段時間里”。主句中的動作或事情在從句中的動作或事情的進展過程中發(fā)生,從句中的動詞一般要用延續(xù)性動詞。在when表示a period of time時,兩者可以互換。Please dont talk so loud while others are working.He fell asleep while/when reading. Strike while the iron is hot.(用as或when不可,這里的while意思是“趁”)凡是從句都必須有引導詞,引導時間
13、狀語從句的詞有 when, before, after, until, as soon as, while 等,具體用法如下:1. when 意為“當時”,引導時間狀語從句,表示主句的動作和從句的動作同時或先后發(fā)生。例如: I feel very happy when you come to see me. 你(們)來看我時,我感到很高興。When you are crossing the street, you must be careful. 你(們)過街道時,一定要小心。when引導的時間狀語從句,when的從句可以用延續(xù)性動詞,也可以用點動詞。例如:He was working at
14、the table when I went in. 當我進去的時候,他正在桌旁工作。Someone knocked at the door when I was sleeping. 當我正在睡覺時,有人敲門。I will visit my good friend when I have time. 當我有空兒時,我將去看望我的好友。I worked for a foreign company when I was in Shanghai. 當我在上海時,我為一家外國企業(yè)工作。注:when也可以作并列連詞,表示一個動詞正在進行的時候,突然間發(fā)生了另外一件事。I was fishing by th
15、e river , when someone called for help. 我正在河邊釣魚,就在那時有人求救。We were working in the chemistry lab, when the lights went out. 我們正在化學實驗室工作,突然燈都熄滅了。2. before 意為“在之前”,引導時間狀語從句時,表示主句的動作發(fā)生在從句的動作之前。例如: We cleaned the classroom before we left school yesterday.昨天離開學校之前,我們打掃了教室。 He had been a cook before he went
16、to college . 他上大學前曾當過廚師。after 意為“在之后”,引導時間狀語從句時,表示主句的動作發(fā)生在從句的動作之后。例如: After you use plastic bags, you mustnt throw them about. 你(們)用過了塑料袋之后,不準到處亂扔。He called me after he had finished his work. 他在工作完之后給我打了個電話。注:若主句和從句兩個動作發(fā)生的先后順序十分接近,那么也可以不用完成時態(tài),例如上面的第二句可改成:He called me after he finished his work. 3. s
17、ince引導的時間狀語從句,譯為“自從”,主句常用現(xiàn)在完成時,從句常用一般過去時。例如:We have made many dumplings since we began to cook. 自從我們開始做飯起,我們已經(jīng)包了許多餃子了。We havent seen each other since we parted . 我們自從分手以后一直沒見過面。注:常用句型:It is +時間段+since從句 譯為:自從有多長時間了。例如:It is six years since she graduated from the university. 自從她大學畢業(yè)已有六年的時間了。4. until
18、意為“直到時”,引導時間狀語從句時,表示主句的動作發(fā)生在從句的動作之前。當主句的謂語動詞是持續(xù)性動詞時,主句常用肯定形式;當主句的謂語動詞是非持續(xù)性動詞時,從句常用否定形式, not. until. 意為“直到才”,這時的until可以用before 來替換。例如:Ill stay here until you come back. 我會呆在這里,直到你回來。(stay表示的動作可以持續(xù)) He didnt go to bed until he finished his homework.他直到做完作業(yè)才睡覺。(go to bed 表示的動作不能持續(xù)) 5. as soon as 意為“一就”
19、,表示從句的動作一發(fā)生,主句的動作馬上就發(fā)生。例如: Ill tell him about it as soon as he comes back.他一回來我就告訴他這件事。6. while引導的時間狀語從句,常譯為“與同時,在期間”,while的從句中常用延續(xù)性動詞或表示狀態(tài)的詞。例如:They rushed in while we were discussing problems. 當我們正在討論問題時,他們沖了進來。Father was cleaning the car while I was playing computer games. 當我正在打電子游戲時,爸爸正在清洗汽車。注:w
20、hile也可以作并列連詞,表轉(zhuǎn)折的關(guān)系,相當于but,譯為“然而”。 例如:I like listening to music, while my brother likes doing sports. 我喜歡聽音樂,而我的兄弟愛好運動。7. till和until引導的時間狀語從句,譯為“直到為止”,not till / until引導的時間狀語從句,譯為“直到才”。前者強調(diào)主句動作的結(jié)束,用延續(xù)性動詞,后者強調(diào)主句動作的開始,用點動詞。例如:I will wait for my friend until / till he comes. 我要一直等到我朋友來。We wont start ou
21、r discussion until / till he comes. 我們要等到他來了,再開始我們的討論。2. 條件狀語從句用法要點。 我們主要看一下由if引導的條件狀語從句。if 意為“如果”,引導條件狀語從句時,表示假如有從句的動作發(fā)生就(不)會有主句的動作發(fā)生。例如: If it doesnt rain tomorrow, we will go there by bike.如果明天不下雨,我們就騎自行車去那里。If I get there early, I can see the doctor quickly.如果我早早地到那里,我就可以快點看病。3. 地點狀語從句用法要點。常用whe
22、re(哪里)和wherever(無論哪里)例如:Where there is a will, there is a way. 有志者,事竟成。We will go wherever the motherland needs us most. 我們要到祖國最需要的地方去。4. 原因狀語從句用法要點。常用的引導連詞有because, as和since。三者的區(qū)別是:在回答問題的時候,使用because;對于顯而易見的原因,常用as或since;as和since的從句常放在主句之前,而because的從句常放在主句之后。eg.Why did you go? I went because Tom to
23、ld me to go. 你為何去?那是因為湯姆叫我去。He was angry not because we were late but because we made a noise. 他很生氣不是因為我們來遲了,而是因為我們弄出了聲音。As it was raining hard, we had to be indoors. 由于雨太大,我們只好呆在家里。Since you feel ill, youd better not go to work. 既然你感覺不舒服,你最好不要去上班了。5. 目的狀語從句用法要點。常用的引導連詞有so that, that和in order that譯為
24、:以便,為了,目的是。例如:Please speak more slowly so that we can make full notes. 請講慢一點,以便我們能作詳細筆記。I shall write down your address that I may not forget. 我要把你的地址記下來,以免忘記。I sent the letter by air mail in order that it might reach him in time. 這封信我以航空信發(fā)出,以便他能及時收到。注:目的狀語從句可以用動詞不定式來替換做目的狀語eg.We work harder than us
25、ualfinish it in a week. 我們比平常加倍努力工作以在一周內(nèi)完成工作。三:主句與從句時態(tài)一致的問題。 在時間狀語從句和條件狀語從句中,主句和從句之間的時態(tài)一致問題一般分下列兩種情況: 1. 若主句是祈使句,或主句中有情態(tài)動詞,或主句中謂語動詞是一般將來時,那么從句用一般現(xiàn)在時表示一般將來時。例如: Be careful when you cross the road. 過馬路時要小心。Put up your hand if you have any questions to ask. 如果你們有問題要問的話,請舉手。The traffic must stop when th
26、e lights are red. 紅燈亮時,車輛必須停下。2. 若主從句謂語動詞都是陳述過去,那么主從句都可以用一般過去時。例如: She could sing when she was four years old. 她四歲的時候就會唱歌?!菊Z法過關(guān)】1I was drawing a horse _the teacher came in. A. while B. as C. when D. the moment2Some passengers were walking through one of the big halls at Paris Charles De Gaulle Airpo
27、rt _ the whole roof(屋頂)fell down. A. while B. as soon asC. when D. after3You will stay healthy _ you do more exercise, such as running and walking. A. if B. how C. before D. where4-Shall we go on working?-Yes, _ I prefer to have a rest. A. when B. if C. because D. though5None of us knew what had hap
28、pened _ they told us about it. A. when B. until C. after D. though6-I hope youll enjoy your trip, dear!-Thank you, mum. Ill give you a call _ I get there. A. until B. as soon as C. since D. till7The camera is expensive I cant afford it. A. so, that B. such, that C. so, as to D. enough, that8I never
29、seem to lose any weight, hard I try. A. even though B. no matter how C. as if D. ever since9Shall we go on working? Yes , I prefer to have a rest . Awhen BifCbecause Dthough10Edison never gave up, he failed many times. Aand Bthough Cor11The policeman asked the child cross the street the traffic lights turned green. Anot; whenBdont; beforeCnot to; until12-Its time to go to bed ,Li Ming. -Mum, I have a lot of homework to do ,I wont go to bed I finish it A .after B.until C.as soon as D .since13You should make a good plan _ you do anything important. A. before B. after C. tho
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