1、中考英语语法:状语从句一、时间状语从句在时间状语从句中,一般要用动词一般目前时态表达未来时,用一般过去时表达过去未来式。时间状语从句常见连词有: 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等引导。1 考察when, while, as引导,表达“当时候”.【考例】一Mum,_shall we have lunch? We
2、will have it when your dad_. 07连云港市A when;returns B where returns Cwhere;will return Dwhen;will return答案A解析 答语中when引导了一种时间状语从句,主句用了一般未来时态,因此从句用一般目前时态,可见对的答案在A和B之中。既然答语用了时间状语来回复,可见问句问询也一定是时间,从而确定对的答案为A。2. before 使用措施:before本意为“在之前”,根据详细语境还可理解为“还没来得及/还没有就,趁着还没就,不知不觉就,才”等。如:【考例】Could you please give me
3、 your e-mail address _you go? 昆明市A. as soon as B. before C. after D. until答案B解析这四个词(组)所有可以引导时间状语从句,as soon as一就before在之前;after在后来;until直到才。分析句子可以看出句意为“在你走之前把你电子邮件地址给我好吗?”2until 和till 使用措施:和肯定式主句连用,主句谓语必需是延续性动词,till/ until表达“直到”;与否认式主句连用,且主句谓语是非延缓性动词时,till/ until表达“直到才”。其强调句型为“notuntil” ,在句首时要采用倒装形式。
4、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 解析本题应从句意人手。until常见于否认句中,构成notuntil构造,意为“直到才”,该句意为“直到交通灯变绿,我们才能穿过马路”。The kids didnt start to fly kites in the playground _the rain stopped. 成都市A. if B. until C. whenever答
5、案B解析 notuntil直到才。“直到雨停孩子们才可以去操场放风筝”,-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为固定构造,意为“直到才”。二、条件状语从句引导条件状语从句从属连词有if ,unless(=if not假如不,除非),as/so long as ,while(=as long as 只要),supposing(that),provided/provid
6、ing(that),in case(假使),on condition that(在条件下)等。如:【考例】_you go to bed earlier, you wont feel tired in the mornings沈阳市A Unless B Because CIf DWhen答案C 解析考察if引导条件状语从句。“假如你早一点上床睡觉,那么你在上午就不会感到累。”You wont pass your exams _ you work harder. 广东省 A. when B. if C. unless D. after答案C 解析when,after一引导是时间状语从句,不合题意;
7、if,unless引导是条件状语从句,If不合句意,“除非你愈加努力地学习,否则,你不会通过考试”。故用unless。三、让步状语从句用来引导让步地点状语从句从属连词有:though,although,even ifthough, while(虽然、尽管),for a11(that)(尽管)whetheror(不管不管还是)和“疑问词+ever(whatever,wherever,whoever,however,)”和 “no matter +疑问词”等。 【考例】Shall we go on working? Yes , I prefer to have a rest . ( 江西省南昌)
8、Awhen BifCbecause Dthough答案: D命题立意:本题考察从属连词引导让步状语从句使用措施。试题解析:根据上句:我们继续工作吗?是,尽管我想休息会。Edison never gave up, he failed many times. ( 四川)AandBthoughCor答案: B命题立意:本题考察从属连词引导让步状语从句使用措施。试题解析:根据题意:虽然爱迪生失败多次,她也决不放弃。though用来引导让步状语从句。故选B。四、目的状语从句引导目的状语从句从属连词有 so that , in order that (为了,以便);in case(以防,以免),lest(
9、省得,以防),for fear that(以免,惟恐)等。从句中一般具有can , could, may,might ,will, would等情态动词。如:【考例】一More and more people in Beijing are learning English _they can better serve the 0lympic Games一Im sure they will宜昌市Abecause of B so that Ceven though Das if答案B解析 本题也应从句意人手。越来越多人学习英语,“为是”能更多愈加好地为奥运服务。so that引导一种目的状语从句。
10、五、成果状语从句【考例】The camera is expensive I cant afford it. ( 辽宁本溪)A. so, that B. such, that C. so, as to D. enough, that答案: A命题立意:本题考察从属连词引导成果状语从句使用措施。试题解析:根据题意:这摄影机太贵以致我买不起。expensive为形容词,sothat句中要用形容词或副词;suchthat要用形容词修饰名词。其他两项不能引起从句。故选A。【语法回忆】状语从句分类。1. 时间状语从句使用措施要点。(1)as、when、while使用措施一览表。类别作 用例 句asas表达
11、“当时候”,往往和when/ while通用,但它着重强调主句和从句动作或事情同步或几乎同步发生。She came up as I was cooking.(同步)The runners started as the gun went off.(几乎同步)when(at or during the time that )既可以表达在某一点时候,又可表达在某一段时间内,主句和从句动作或事情可以同步发生也可以前后发生。It was raining when we arrived.(指时间点)When we were at school, we went to the library every d
12、ay.(在一段时间内)whilewhile意思是“当时候”或“在某一段时间里”。主句中动作或事情在从句中动作或事情进展过程中发生,从句中动词一般要用延续性动词。在when表达a period of time时,两者可以互换。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,这里while意思是“趁”)一般从句所有必需有引导词,引导时间状语从句词有 when, before, after, unt
13、il, as soon as, while 等,详细使用措施如下:1. when 意为“当时”,引导时间状语从句,表达主句动作和从句动作同步或前后发生。例如: I feel very happy when you come to see me. 你(们)来看我时,我感到很快乐。When you are crossing the street, you must be careful. 你(们)过街道时,一定要小心。when引导时间状语从句,when从句可以用延续性动词,也可以用点动词。例如:He was working at the table when I went in. 当我进去时候,她
14、正在桌旁工作。Someone knocked at the door when I was sleeping. 当我正在睡觉时,有人敲门。I will visit my good friend when I have time. 当我有空儿时,我将去看望我好友。I worked for a foreign company when I was in Shanghai. 当我在上海时,我为一家外国企业工作。注:when也可以作并列连词,表达一种动词正在进行时候,忽然间发生了此外一件事。I was fishing by the river , when someone called for hel
15、p. 我正在河边钓鱼,就在那时有人求救。We were working in the chemistry lab, when the lights went out. 我们正在化学试验室工作,忽然灯所有熄灭了。2. before 意为“在之前”,引导时间状语从句时,表达主句动作发生在从句动作之前。例如: We cleaned the classroom before we left school yesterday.昨天离开学校之前,我们打扫了教室。 He had been a cook before he went to college . 她上大学前曾当过厨师。after 意为“在后来”,
16、引导时间状语从句时,表达主句动作发生在从句动作后来。例如: After you use plastic bags, you mustnt throw them about. 你(们)用过了塑料袋后来,不准到处乱扔。He called me after he had finished his work. 她在工作完后来给我打了个 。注:若主句和从句两个动作发生前后次序十分靠近,那么也可以不用完毕时态,例如上面第二句可改成:He called me after he finished his work. 3. since引导时间状语从句,译为“自从”,主句常见目前完毕时,从句常见一般过去时。例如:
17、We have made many dumplings since we began to cook. 自从我们开始做饭起,我们已经包了诸多饺子了。We havent seen each other since we parted . 我们自从分手后来一直没见过面。注:常见句型:It is +时间段+since从句 译为:自从有多长时间了。例如:It is six years since she graduated from the university. 自从她大学毕业已经有六年时间了。4. until 意为“直到时”,引导时间状语从句时,表达主句动作发生在从句动作之前。当主句谓语动词是持续
18、性动词时,主句常见肯定形式;当主句谓语动词是非持续性动词时,从句常见否认形式, not. until. 意为“直到才”,这时until可以用before 来替代。例如:Ill stay here until you come back. 我会呆在这里,直到你回来。(stay表达动作可以持续) He didnt go to bed until he finished his homework.她直到做完作业才睡觉。(go to bed 表达动作不能持续) 5. as soon as 意为“一就”,表达从句动作一发生,主句动作立即就发生。例如: Ill tell him about it as s
19、oon as he comes back.她一回来我就告诉她这件事。6. while引导时间状语从句,常译为“和同步,在期间”,while从句中常见延续性动词或表达状态词。例如:They rushed in while we were discussing problems. 当我们正在讨论问题时,她们冲了进来。Father was cleaning the car while I was playing computer games. 当我正在打电子游戏时,父亲正在清洗汽车。注:while也可以作并列连词,表转折关系,相称于but,译为“然而”。 例如:I like listening to
20、 music, while my brother likes doing sports. 我爱慕听音乐,而我兄弟爱好运动。7. till和until引导时间状语从句,译为“直到为止”,not till / until引导时间状语从句,译为“直到才”。前者强调主句动作结束,用延续性动词,后者强调主句动作开始,用点动词。例如:I will wait for my friend until / till he comes. 我要一直等到我好友来。We wont start our discussion until / till he comes. 我们要等到她来了,再开始我们讨论。2. 条件状语从句
21、使用措施要点。 我们关键看一下由if引导条件状语从句。if 意为“假如”,引导条件状语从句时,表达假如有从句动作发生就(不)会有主句动作发生。例如: If it doesnt rain tomorrow, we will go there by bike.假如明天不下雨,我们就骑自行车去那里。If I get there early, I can see the doctor quickly.假如我早早地到那里,我就可以快点看病。3. 地点状语从句使用措施要点。常见where(哪里)和wherever(不管哪里)例如:Where there is a will, there is a way.
22、 有志者,事竟成。We will go wherever the motherland needs us most. 我们要到祖国最需要地方去。4. 原因状语从句使用措施要点。常见引导连词有because, as和since。三者辨别是:在答复问题时候,使用because;对于显而易见原因,常见as或since;as和since从句常放在主句之前,而because从句常放在主句后来。eg.Why did you go? I went because Tom told me to go. 你为何去?那是由于汤姆叫我去。He was angry not because we were late b
23、ut because we made a noise. 她很生气不是由于我们来迟了,而是由于我们弄出了声音。As it was raining hard, we had to be indoors. 由于雨太大,我们只好呆在家里。Since you feel ill, youd better not go to work. 既然你感觉不舒适,你最佳不要去上班了。5. 目的状语从句使用措施要点。常见引导连词有so that, that和in order that译为:以便,为了,目的是。例如:Please speak more slowly so that we can make full no
24、tes. 请讲慢一点,以便我们能作详细笔记。I shall write down your address that I may not forget. 我要把你地址记下来,以免忘掉。I sent the letter by air mail in order that it might reach him in time. 这封信我以航空信发出,以便她能立即收到。注:目的状语从句可以用动词不定式来替代做目的状语eg.We work harder than usualfinish it in a week. 我们比平常加倍努力工作以在一周内完毕工作。三:主句和从句时态一致问题。 在时间状语从句
25、和条件状语从句中,主句和从句之间时态一致问题一般分下列两种状况: 1. 若主句是祈使句,或主句中有情态动词,或主句中谓语动词是一般未来时,那么从句用一般目前时表达一般未来时。例如: Be careful when you cross the road. 过马路时要小心。Put up your hand if you have any questions to ask. 假如你们有问题要问话,请举手。The traffic must stop when the lights are red. 红灯亮时,车辆必需停下。2. 若主从句谓语动词所有是陈说过去,那么主从句所有可以用一般过去时。例如: S
26、he could sing when she was four years old. 她四岁时候就会唱歌。【语法过关】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 Airport _ the whole roof(屋顶)fell down. A. while B. as soon asC. when D. af
27、ter3You 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 happened _ they told us about it. A. when B. until C. after D. though6-I
28、 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 seem to lose any weight, hard I try. A. even though B. no matter how
29、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
30、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. though D. until14_ they are brothers, they dont look like each other at all. A. BecauseB. Thou
31、ghC. When D. As15。I enjoy learning English, _ it takes me a lot of time. A.as ifB.thoughC.becauseD.for【参照答案】1。答案C 解析:when为并列连词“这时”(=and then),句意为:我们合法我在画马时候,这是老师进来了。while表达“合法时”,用于同步进行动作。2答案C 解析:根据题构造,be doing sthwhen表达“正在这时”意思。故选C。3答案A 解析: 从意思上看,从句应是一种条件状语从句,在这四个选项中只有if能引导条件状语从句,因此选A。4答案D 解析: 从意思上看
32、,只有选though才能说得通。5答案B 解析: 本句意思是“在此前我们没人懂得这件事。”要表达着一意思应用“notuntil” 这一句型。6答案B 解析: 本题意思是“一到那里,我就给你打 。”要表达这个意思应选择as soon as。7答案A 解析:根据题意:这摄影机太贵以致我买不起。expensive为形容词,sothat句中要用形容词或副词;suchthat要用形容词修饰名词。其他两项不能引起从句。故选A。8答案B 解析:根据题意:不管我怎样努力,仿佛也没有减肥。9答案 D 解析:根据上句:我们继续工作吗?是,尽管我想休息会。10答案 B 解析:根据题意:虽然爱迪生失败多次,她也决不放弃。though用来引导让步状语从句。故选B。11答案C 解析:until用在否认句中,关键动词一般是终止性,表达这个动词动作直到till(until)所示时间才发生。故选C。12答案 B 解析:until用在否认句中,关键动词一般是终止性,表达这个动词动作直到till(until)所示时间才发生。故选C。13答案 A 解析:根据题意:在你做关键事情之前,应当做好计划。表达“在之前”意思,故应选择A。14。答案B 解析:根据题意:尽管她们是兄弟,但她们互相一点所有不像。引导让步状语从句,应选B。15。答案B解析:根据题意:尽管她花费了我诸多时间,但我还是爱慕学英语。应选B。