Unit 1- 3 语法：状语从句讲解及练习2026-2027学年外研版九年级上册

九上外研Unit1-3语法：状语从句讲解与练习（后附答案) 一、状语与状语从句概述 1.状语 修饰动词、形容词、副词或整个句子，表示时间、地点、原因、目的、结果、条 件、让步、方式、比较等。 He runs quickly.(方式状语)；I met her yesterday.(时间状语) 2.状语从句 用一个完整的句子充当状语成分，由从属连词引导，不能独立存在。 When I arrived,she was cooking. 口诀：状语从句不难记，连词引导是钥匙： 主句从句要分清，时态呼应别忘记。 二、条件状语从句 1.引导词 if=如果；unless=除非=if.not 2.核心时态规则一"主将从现” 主句：用一般将来时(wil/shal+动词原形)/情态动词/祈使句 从句：用一般现在时（表将来意义） 3.常见结构 结构一：f+从句（一般现在时），主句（一般将来时） If it rains tomorrow,we will cancel the trip. 结构二：主句（祈使句)，and/or+简单句（时态为一般现在时或含有情态动 词) Hury up,or you will miss the bus.=If you don't hury up,you will miss the bus. 结构三：unless=if.not You won't pass unless you study hard.You won't pass if you don't study hard. 结构四：if条件句与without的转换 If there is no water,we cannot live.->Without water,we cannot live. If you don't help me,I will fail.Without your help,I will fail. 4.易错点 引导宾语从句时意为"是否"，不遵循"主将从现"，而是遵循“主现从随，主 过从过，客观事实永一现”。 I don't know if he will come tomorrow.(宾语从句，用将来时) If he comes tomorrow,I'll tell you.(条件状语从句，用现在时) 三、原因状语从句 1.because"因为"，语气最强，回答why提问，不能与so连用 I was late because I missed the bus 2.since"既然"，表示已知或显而易见的原因 Since everyone is here,let's start. 3.as"由于"，语气较弱，表示明显的原因 As it was raining,we stayed home 4.for"因为"，并列连词，放在主句之后补充说明 He must be asleep,for the lights are off. 5.in that'"在于"，只能放在句中，不能放句首 This plan is better in that it costs less. 注意： because:后接完整句子 because of:后接名词/代词/动名词(-ing) 同类短语：thanks to（多亏)，due to（由于)，as a result of（作为..的结果) We stayed at home because it was1 aining.(接句子) We stayed at home because of the rain.(接名词) We stayed at home due to the bad weather.(接名词短语) We stayed at home as a result of the heavy rain.(接名词短语) Thanks to your help,I finished it on time.（多亏了你的帮助) 四、时间状语从句 l.when"当.时"，可指时间点或时间段；可表示"就在这时，突然” I was reading when the phone rang. 2.whle"在..期间"，强调一段时间，从句动词用延续性动词：也可表对比"然而 While I was watching TV,he slept. While my mother is cooking,my father is sweeping the floor. Tom is tall while Jim is short. 3.as"一边一边."；"随着" She sang as she walked. 4.as soon as"一就."，遵循"主将从现” I'll call you as soon as I arrive. 5.until/till"直到..”（延续性动词+ntl) not.nt1"直到..才."（+瞬间动词) I waited until he came I didn't leave until he came. 6.since"自从.."，主句用现在完成时，从句用一般过去时 I have lived here since I came It is/has been 2 years since I moved here. 7.before/after作连词：后接句子（遵循"主将从现"） Wash your hands before you eat. I went to bed after I finished my homework 作介词：后接动名词(-ing) Wash your hands before eating. I went to bed after finishing my homework. 8.when/while/as的区别 when:可接瞬间动作或延续动作（过去进行时或一般过去时） wile:只能接延续动作，强调动作过程（过去进行时或主从句都用过去进行时） as:强调两个动作同时发生，常译为"一边..一边..” 五、地点状语从句 1.where'"在.地方" Stay where you are. Where there is a will,there is a way.*(有志者，事竟成。) 2.wherever'"无论哪里"=no matter where I'll go wherever you go. 注意：where引导的三大从句区分 地点状语从句：修饰主句动词，表示"在地方”，前无先行词 Stay where you are..（修饰stay,表示待在"你所在的地方") Where there is a will,.there is a way.(修饰主句，表示"在有意志的地方") 定语从句：修饰前面的表示地点的先行词（名词） This is the park where we met.（where=in which,修饰先行词park) 宾语从句：跟在动词或介词后面，表示"的地方” I don't know where he lives.(作know的宾语) This is where I grew up.(作is的表语，也可视为表语从句) 六、目的状语从句 1.so that"为了，以便"，从句中常有can/could/may/night/wil/would等情 态动词 Speak louder so that everyone can hear you. 2.in order that较正式，"为了" He got up early in order that he could catch the train. 3.in case"以防" Take an umbrella in case it rains. 4.for fear that"生怕，以免"，常接虚拟语气(should+动词原形) She closed the window for fear that she should catch cold. 注意：可以与in order to/so as to/to+do sth转换 七、结果状语从句 结构：so.that与such.hat."如此以至于." 区分口诀：名前such,形副so,多多少少也用so。 1.so+形容词/副词+that The box is so heavy that I can't carry it. 2.so+形容词+a/an+单数可数名词+that She is so lovely a girl that we all like her 3.such+a/an+形容词+单数可数名词+that She is such a lovely girl that we all like her. 4.such+形容词+不可数名词/复数名词+that It is such terrible weather that we stayed home. 5.同义句式转换 so.that..肯定句中.enough to.. s0.that.否定句分to0.to. She is so young that she can't go to school. =She is too young to go to school She is not old enough to go to school. 注意：当前后主语不同时，需用for sb: The tree is so tall that he can't climb it.=The tree is too tall for him to climb. 八、让步状语从句 1.though/although"虽然"，不能与but连用（可与yet/stll连用) Although he is tired,he keeps working.（√) Although he is tired,but he keeps working.(X) Although he is tired,yet he keeps working.( 2.even though/even if"即使"，语气更强 I'll help you even if it takes all day. 3.whatever/wherever/whenever"无论什么/无论哪里/无论何时" Whatever you do,I'll support you. 九、方式状语从句 1.as"按照.." When in Rome.do as the romans do 2.asif/as though"仿佛，好像"，常用虚拟语气 He talks as if he knew everything.(实际上并不知道) 十、比较状语从句 1.as+形容词/副词原级+as"和.一样" She is as tall as her mother. 2.not as/so+形容词/副词原级+as"不如" He is not as/so smart as his brother. 3.比较级+than She runs faster than me. 需用"主将从现"的连词汇总 1.条件状语从句：if,nless 2.时间状语从句：when,while,as,as soon as,ntil,before,after,whenever 一、从方框中选择合适的连词填空（每个只能用一次）： when while/until since/if/unless/although because/so that as soon as 1.I'll wait here he comes back 2. it is raining,you'd better take a taxi 3. everyone is here,let's begin the meeting 4.You will fail you give up. 5.I have known her I was a child. 6. he was cooking,I was reading a newspaper. 7. she is young,she knows a lot about the world. 8.Speak louder everyone can hear you. 9.I was about to leave the phone rang. 10.We won't start all the guests arrive. 二、用所给词的适当形式填空 11.Ifit (rain)tomorrow,we (stay)at home 12.She (call)you as soon as she (get)home. 13.I (not leave)until he (come)back 14.He (live)here since he (move)to this city. 15.Please (tell)her the news if she (come). 16.Ifhe (miss)the train,he (be late)for the meeting. 17.He (pass)the driving test if he (not be)so careless 18.When I (return)home,all my family gave me big hugs. 19.I was doing my homework while my mother (cook). 20.We'll go to the farm ifit (not rain)tomorrow. 三、单项选择 21.Our classroom won't be clean we clean it every day. A.after B.while C.unless D.because 22.The boy won't go to sleep unless his mom him a story. A.tells B.told C.is telling D.will tell 23.My pen friend knows a lot about China she has never been here. A.although B.if C.because D.until 24 we walked into the museum,we saw thousands of beautiful butterflies A.Now that B.As soon as C.Although D.So that 25 Jill isn't feeling well today,he still goes to school. A.Although;but B.But;although C.Although;/D.but;although 26.I don't know ifit tomorrow,but ifit,I'll stay at home. A.will rain;rains B.will rain;will rain C.rains;will rain D.rains;rains 27.-Hurry up!-I'm afraid we take a taxi,we'll still miss the train A.if B.unless C.so that D.even if 28.Tom has studied very hard he came to our school. A.since B.when C.before D.while 29.You never really understand a person you consider things from his point of view. A.until B.while C.because D.if 30.Dad sometimes goes shopping with us he hates going shopping. A.because B.so C.though D.if 31.-Can I ride a shared bike?-No,not you are 12. A.when B.after C.until D.as 32 the weather improves,we'll have to cancel the outdoor picnic. A.Unless B.If C.Because D.When 33.Lin Shuhao is famous all the basketball fans in China know him. A.too;to B.enough;to C.so;that D.as;as 34. the workers are very tired, they keep on working. A.Because;/B.Though;C.Because;so D.Though;but 35.-Where is the comic book?-I brought it to you you were in the reading room yesterday. A.when B.if C.because D.before 36.He was so busy preparing for the exam that A.he had enough time to watch matches B.he was free to go shopping online C.he had no time to do sports every day D.he often went online 37.-Let's go climbing this Saturday the weather is fine.-Good idea! A.though B.if C.unless D.although 38.The movie was moving almost everyone cried. A.so;that B.such;that C.too;to D.enough;to 39.It is heavy box I can't carry it. A.so;that B.such;that C.such a;that D.too;to 40.Jim has much homework he can't hang out with us. A.too;to B.such;that C.so;that D.enough;to 四、同义句转换（每空一词) 41.We were very tired,so we took a taxi back. ->We were tired we took a taxi back. 42.Joan got up early in order to reach home before dark. →Joan got up early she could reach home before dark. 43.Anyone will fall behind if he doesn't have a good habit. ->Anyone will fall behind he a good habit 44.Don't touch the machine if the teacher doesn't allow you to >Don't touch the machine the teacher you to 45.Use your mind,and you will work out the solution. >you use your mind,you work out the solution. 46.She is so young that she can't go to school.（改为简单句) →She is young go to school. 47.The tree is so tall that he can't climb it.(改为简单句) ->The tree is tall him climb. 48.I didn't leave until my mother came back.(改为肯定句) →I my mother came back. 49.If it doesn't rain,,we'1 go hiking.（改为同义句) →We'll go hiking it 50.He is such a clever boy that we all like him.(改为同义句) →Heis clever boy we all like him. 5l.The scientist was so weak that he couldn't continue with his research.（改为简单 句) →The scientist was__weak」 continue with his research. 52.We'l1 go bike riding if it doesn't rain tomorrow..(改为同义句) →We'll go bike riding_it tomorrow. 53.Without water,we could not live.(改为含if的句子) there no water,we could not live. 54.Bing Dwen Dwen is very popular..It is really hard to get one..（合并为一句) ->Bing Dwen Dwen is popular it is really hard to get one 55.The lecture from China's space station was very interesting.It attracted many children.(合并为一句) →The lecture was interesting it attracted many children. 五、句子翻译 六、56.如果你放弃，你就会落后。 57.梅梅要等到雨停后才会离开这儿。 58.这个问题太难了，几乎没有学生能回答出来。 59.既然这个项目很有价值，为何不尽快开展呢？ 60.现代医学发展如此迅速，以至于绝大多数眼疾可以被治愈。 参考答案 一、用适当的连词填空（第1-10题） 1.until 2.Because/As 3.Since 4.unless 5.since 6.While 7.Although /Though 8.so that 9.when 10.until 二、用所给词的适当形式填空（第11-20题) 11.rains;will stay 12.will call;gets 13.won't leave;comes 14.has lived;moved 15.tell;comes 16.misses;will be late 17.will pass,isn't 18.returned 19.was cooking 20.doesn't rain 三、单项选择（第21-40题） 21.C 22.A 23.A 24.B 25.C 26.A 27.D 28.A 29.A 30.C 31.C 32.A 33.C 34.B 35.A 36.C 37.B 38.A 39.C 40.C 四、同义句转换（第41-55题） 41.so;that 42.so that 43.unless;has 44.unless;allows 45.If will 46.too;to 47.too;for,to 48.waited until 49.unless;rains 50.so;a;that 51.too;to 52.unless;rains 53.If,were 54.so;that 55.so;that 五、句子翻译（第56-60题） 56.You will fall behind if you give up 57.Meimei won't leave here until the rain stops. 58.This question was so difficult that few students could answer it. 59.Why don't you carry out the project as soon as possible since it is of great value? 60.Modern medicine is developing so quickly that most eye diseases can be cured.