第2部分 专题3 第3章 并列句与状语从句（Word教参）-【优化指导】2025年高考英语一轮复习高中总复习·第1轮（译林版）

第三章　并列句与状语从句 [对应学生用书P330] 一、并列句 (一)常见并列句的类型及并列连词 类型 并列连词 并列关系(递进关系) and、both ...and ...、not only ...but also ...、neither ...nor ...等 转折或对比关系 but、yet、whereas、while等 选择关系 or、or else、either ...or ...、not ...but ...等 因果关系 for、so、as等 ①Both Peter and Tom are from South Africa. 彼得和汤姆都来自南非。 ②First，my English is very good and I'm open­minded and warm­hearted, so I'm getting along well with everyone. 首先，我的英语很好，而且我性格外向、很热心，因此我和每个人都相处得很好。 ③He tried hard to catch up with his classmates, but he failed. 他尽力赶上同学们，但是失败了。 ④The children can go with us, or they can stay in. 孩子们可以跟我们去，也可以待在家里。 ⑤He must have been caught in the rain，for he is wet all over. 他肯定被雨淋了，因为他浑身都湿透了。 (二)并列连词构成的常用句型 1．and构成的句型 (1)祈使句＋and＋陈述句(祈使句相当于一个条件状语从句，and后面的句子相当于一个表示结果的主句) Work hard, and you will succeed.(＝ If you work hard，you will succeed.) 努力学习，你就会成功。 (2)名词词组＋and＋陈述句(名词词组相当于一个条件状语从句，其中常含有more、another等词) Another try, and you'll make a success. 再试一次，你就会取得成功。 2．or (else)构成的句型 (1)祈使句＋or (else)＋陈述句 Seize the chance, or (else) you'll regret. 抓住这次机会，否则你会后悔的。 (2)名词词组＋or (else)＋陈述句 More practice, or (else) you will soon forget what you learned in class. 多练习，否则你很快就会忘记课上学的东西。 3．when构成的句型 when连接并列句，意为“正在这时”，表示某件事正在发生或刚要发生或刚刚完成时，突然发生另一动作。 (1)sb.be doing sth. when ...某人正在做某事，这时…… Last Monday, I was walking in the street when I suddenly saw an old man fall off his bicycle. 上周一，我正在街上散步，这时我突然看到一位老人从自行车上摔了下来。 (2)sb.be about to do sth. when ...某人正要做某事，这时…… We were about to set off when it suddenly began to rain. 我们正打算动身，突然下起雨来了。 (3)sb. be on the point of doing sth. when ...某人正要做某事，这时…… She was on the point of going to bed when someone knocked at the door. 她正要上床睡觉，突然有人敲门。 (4)sb.had just done sth. when ...某人刚做完某事，这时…… I had just finished sweeping the floor when the telephone rang. 我刚刚扫完地，这时电话铃响了。 4．while构成的句型 while作并列连词，意为“而，却”，表示对比。 She loves playing piano，while her sister is only interested in guitar. 她喜欢弹钢琴，而她的姐姐只对吉他感兴趣。 二、状语从句 (一)时间状语从句 1．when, while与as引导的时间状语从句 连词 从句的谓语动词 用法 when 延续性动词和非延续性动词 从句的动作和主句的动作可以同时发生，也可以先后发生；当when引导的时间状语从句为主系表结构，其主语和主句的主语一致，其表语又是一个名词或形容词时，就可以用由when引导的省略句来代替when引导的时间状语从句 while 延续性动词 从句的动作与主句的动作同时发生 as 延续性动词 强调主从句动作相伴发生，可译为“一边……一边……；随着” ①James pretended to be deaf when I spoke to him. 当我和詹姆斯讲话的时候，他假装耳聋。 ②I like listening to music while I am doing my homework. 我喜欢做作业的时候听音乐。 ③As the day went on, the weather got worse. 随着时间的流逝，天气变得更糟糕了。 （1）while在句中的不同含义 ①While I was walking down the street，I came across an old friend.（当……时候） ②While I really don't like art，I find his work impressive.（尽管） ③While there is life there is hope. （只要） ④He likes pop music，while I am fond of folk music.（然而） （2）when常用在be doing ...when ...、be on the point of doing ...when ...、be about to do ...when ...和had just done ...when ...中。 ①They were walking down the street when they saw an accident. 他们正在街上走的时候看到了一起车祸。 ②I was about to go swimming when our guide stopped me. 我刚要去游泳突然我们的导游阻止了我。 2．before与since引导的时间状语从句 (1)before与since的常用句式 连词 词义 常用句式 before 在……之前，还未……就……；……才……；趁……还没有来得及…… ①It will be＋一段时间＋before ...要过……(时间)才…… ②It was not/won't be long before ...不久……就…… ③It was＋时间段＋before ...过了……(时间)才…… since 自从……以来 It is/has been＋一段时间＋since ...(从句用一般过去时) ①It won't be long before we meet again. 过不了多长时间我们就又见面了。 ②It has been/is six years since she graduated from the university. 自从她大学毕业以来已经六年了。 ③It will not be long before you regret for what you've done. 不久你就会为你的所作所为后悔。 (2)since引导的从句如果用非延续性动词，所表示的是自从句谓语动作开始算起；若用延续性动词或状态动词，所表示的就是自动作或状态完成或结束时算起。 It is two years since I became a policeman. 我成为一名警察两年了。 3．表示“一……就……”含义的词(短语)引导的时间状语从句 (1)引导时间状语从句，且表示“一……就……”含义的词或短语有as soon as、the moment、the minute、the instant、immediately、directly、instantly、hardly/scarcely ...when ...、no sooner ...than ...等。 ①Directly I received his letter I went to see him. 我一收到他的信就去看他。 ②I'll give him your message the minute he arrives. 他一来我就把你的留言给他。 (2)hardly/scarcely ...when ...、no sooner ...than ...中主句应用过去完成时，从句应用一般过去时；当no sooner和hardly/scarcely位于句首时，主句要用部分倒装。 ①I had no sooner begun to talk than he rang off. ＝No sooner had I begun to talk than he rang off. 我还没来得及讲话，他就挂断了电话。 ②Scarcely had she heard the familiar voice when she burst out crying. 她一听到这个熟悉的声音就哭了。 4．until与till引导的时间状语从句 连词 位置 用法 注意事项 until 可以放在句首 not ...until ...可用于强调句型 ①until/till用于肯定句时，主句的谓语动词是延续性动词；用于否定句时，主句的谓语动词是非延续性动词 ②not until位于句首时，主句要用部分倒装 till 不可放 在句首 一般不用于强调句型 ①I'll stay here until/till you come back. 我会待在这里，直到你回来。 ②He didn't go to bed until he finished his homework. ＝Not until/till he finished his homework did he go to bed. 他直到做完作业才睡觉。 ③It was not until he told me about it again that I had any idea of it. 直到他再次告诉我这件事，我才有了这个想法。 5．引导时间状语从句的其他常见连词(短语) (1)其他常见的引导时间状语从句的连词(短语)还有after、whenever、every time、each time、next time、the first/last time、any time、by the time、the day/year等。 Every time I express my opinion, she always argues back. 每次我发表意见，她总是反驳。 (2)by the time引导的时间状语，从句如果用一般现在时，主句用将来完成时；从句如果用一般过去时，主句用过去完成时。 ①By the time you arrived, the lecture had already ended. 你到达的时候，报告已经结束了。 ②By the time he comes, we will already have left. 他来的时候，我们将已经离开了。 (二)条件状语从句 1．条件状语从句的常见引导词有if、unless、as/so long as、in case(万一)、once、on condition that、provided/providing (that)、supposing (that)等。 ①My parents don't mind what job I do as long as I am happy. 只要我高兴，我的父母不在意我从事什么工作。 ②You can be allowed to play the game on condition that you finish your homework first. 可以允许你玩游戏，条件是你先完成作业。 ③Don't touch anything unless your teacher tells you to. 除非老师告诉你可以，否则不要触碰任何东西。 2．条件状语从句的时态 用一般现在时代替一般将来时，用一般过去时代替过去将来时。 If everyone does his part, the project will surely be a success. 如果每个人都尽自己的一份力，这个项目一定会成功。 (三)让步状语从句 引导词 从句位置 语序 语气 注意事项 although 灵活 正常 陈述 ①although与though都可以与yet、nevertheless、still连用，但不能和but连用 ②though还可以作副词，意为“可是，然而”，置于句末 ③whoever、whatever、whomever、whichever还可以引导名词性从句，但“no matter＋疑问词”不可以 though 灵活 正常或倒装 陈述 as 句首 倒装(即从句中的表语、状语或动词原形置于句首；若表语是单数名词，前置时要省略冠词) 陈述 while 句首 正常 陈述 even if/ though 灵活 正常 虚拟或 陈述 no matter ＋疑问词/疑问词＋­ever 灵活 正常 陈述 whether ... or not 句首 正常 陈述 ①Although he is rich, yet he is not happy. 尽管他很富有，但是他不快乐。 ②Whether you believe it or not, it is true. 无论你相信与否，它是真的。 （1）as引导让步状语从句时，必须将从句中的表语、状语或谓语中的实义动词原形提前至从句句首；作表语的单数可数名词前如有冠词，冠词需省略。 ①Though he works hard，he makes little progress. ＝Hard as/though he works，he makes little progress. 尽管他工作努力，但他几乎没有进步。 ②Though he was a child，he knew what was the right thing to do. ＝Child as/though he was，he knew what was the right thing to do. 尽管他是一个孩子，但他知道要去做对的事情。 ③Though you may object, I'll go. ＝Object as you may, I'll go. 尽管你可能反对，但我还是要去。 (2)while也可以引导让步状语从句，意为“尽管”，语气比though/although弱。其引导的从句一般位于句首。 While I like its color, I don't like its shape. 尽管我喜欢它的颜色，但我不喜欢它的外形。 (3)“no matter＋疑问词”不能引导主语从句和宾语从句，而“疑问词＋­ever”则可以。 ①No matter what happened, he would not mind. ＝Whatever happened, he would not mind. 无论发生什么事，他都不介意。 ②Whoever/No matter who breaks the laws, he will be punished. ＝Whoever breaks the laws will be punished.(whoever引导主语从句时不能换成no matter who) 无论是谁违反法律都将受到惩罚。 (四)结果状语从句 1．so that引导结果状语从句时，从句中一般不用情态动词，从句前可加逗号。 We turned up the radio, so that everyone heard the news. 我们把收音机音量调大，这样每个人都能听到新闻。 2．“so ...that”中so后面跟形容词或副词；such ...that中such后面跟名词，基本结构如下： (1)such＋a/an＋adj.＋单数名词＋that从句 (2)such＋adj.＋复数名词/不可数名词＋that从句 (3)such＋many/few＋复数名词＋that从句 (4)so＋adj.＋a/an＋单数名词＋that从句 (5)so＋adv.＋that从句 She told us such an interesting story that we all forgot about the time. ＝She told us so interesting an story that we all forgot about the time. 她给我们讲了一个如此有趣的故事以至于我们都忘记了时间。 (五)原因状语从句 1．because用来回答why的提问，语气最强，一般放在主句之后。 The old man asked Lucy to move to another chair because he wanted to sit next to his wife. 老人让露西坐到另一把椅子上，因为他想坐在他妻子旁边。 2．since/now that表示已知的理由，或稍加分析即可表明的原因，多放在句首；as引导的从句常放在句首，说明次要的原因，主句说明结果，常用于口语中。 （1）when、seeing that、considering that表示“既然；考虑到”，也可引导原因状语从句。 She is still very active，considering that she is getting in years. 考虑到她年事渐高，她仍然很活跃。,（2）because、since、as、for表示原因的区别：because表示直接原因，非推断，语气最强，回答why的问题；since通常放在句首，意为“既然”； as不谈自身的原因，语气最弱； for放在句中，引导后半句表示原因，或补充推断的理由。 ①He didn't come to school because he was ill.,他没来学校，因为他病了。（表示“直接”原因） ②He might be ill，for he didn't come to school.,他可能病了，因为他没来学校。（表示“间接或推断”的原因，不可出现在句首。） ③I cannot hear the professor clearly as there is too much noise where I am sitting. 我坐的地方太吵了，因此听不清楚教授说的话。 (六)地点状语从句 where与wherever意义基本相同，但后者语气较强，多用于书面语。同时地点状语从句在句首时常兼有抽象条件的意味。 Where there's a will, there's a way. 有志者，事竟成。 (七)目的状语从句 1．so that/in order that引导的目的状语从句中需要用情态动词can、could等；in order that引导的从句可位于主句之前或之后；so that引导的从句只能位于主句之后。 2．for fear that(唯恐；以防)与in case引导的目的状语从句中，谓语动词有时也用“should/might/could＋动词原形”。 The boy hid himself behind the tree for fear that his father might see him. 男孩躲在树后，怕他的父亲看见他。 (八)方式状语从句 1．as引导方式状语从句，意为“按照”。 Will you please do the experiment as I am doing? 请你像我一样做这个实验好吗？ 2．as if或as though的意义和用法基本一样；从句中可以用陈述语气表示可能符合事实，也可以用虚拟语气表示与事实相反。 Jack wasn't saying anything but the teacher smiled at him as if he had done something very clever. 杰克什么也没说，但老师朝他笑了笑，好像他做了件很聪明的事。 (九)比较状语从句 “as ...as” “not so/as ...as” “the same ...as”表示相同程度的比较，肯定句用“as ...as”，否定句可用 “not as ...as” 或 “not so ...as”。 He doesn't run so/as fast as Jack (does). 他跑得没有杰克快。 （1）注意区分不同从句：引导的是什么从句，不仅要根据连词，还要根据句子结构和句意来判别。以where为例，能引导多种从句。 ①You are to find it where you left it. 你要在你留下它的地方找它。（地点状语从句） ②Tell me the address where he lives. 告诉我他的住址。（定语从句） ③I don't know where he comes from. 我不知道他来自哪里。（宾语从句） ④Where he has gone is not known yet. 他去了哪里还不知道。（主语从句） ⑤This place is where they once hid. 这个地方是他们曾经躲藏的地方。（表语从句） （2）部分状语从句可用省略形式。 ①The flower his friend gave him will die unless it is）watered every day. 他的朋友送给他的花就要枯萎了，除非每天给它浇水。 ②Even if (I am) invited, I won't go there. 即使我被邀请了，我也不会去的。 ③Once (you are) caught sleeping in class, you'll be punished by your headteacher. 只要你在课上被抓到睡觉了，你就会被班主任惩罚。 ④Though (he was) surprised to see us, he gave us a warm welcome. 尽管见到我们很惊讶，他还是热情地欢迎了我们。 ⑤She won't speak to anyone unless (she is) asked to. 除非被要求，否则她不会跟任何人说话。 ⑥When (it is) compared with the old one, our new house is really like a palace. 当与旧房子相比时，我们的新房子真的像是一座宫殿。 ⑦These young men volunteered to go wherever (they are) needed. 这些年轻人自愿去需要他们的地方。 [对应学生用书P336] “三招定向”解决语法填空中的状语从句 连接词问题 1．牢记连词词义并能熟练运用是解答题目的先决条件。 2．牢记固定句式结构，确定从属连词。 3．根据主从句的逻辑关系确定状语从句的连接词，如果主从句是因果关系，则要考虑用because、as、since；如果主从句有时间先后之分，则要考虑用时间状语从句的连接词；如果从句为主句的条件，则要考虑用if；如果从句表示让步，则要考虑用although、though、while等。 [对点练习] ①It won't be long before he finishes his writing. ②I have_known (know) him since he was a boy. ③Not until all the fish died in the river did the villagers realize how serious the pollution was. ④If you work harder, you will succeed. ＝Work harder, and you will succeed. ＝Work harder, or you won't succeed. ＝Working harder, you will succeed. ⑤You'd better take your umbrella with you in_case/for_fear_(that)_ it rains. ⑥He is such a clever boy that we all like him. ⑦He is such a clever boy as we all like. ⑧The football match will be put off if it rains(rain). ⑨He will go with you as soon as he finishes(finish) his homework. ⑩If_necessary(如果有必要), you may keep the book for another week. 真题演练 1．(2023·新课标Ⅰ卷)To eat one，you have to decide whether to bite a small hole in it first，releasing the steam and risking a spill(溢出)，or to put the whole dumpling in your mouth，letting the hot soup explode on your tongue(舌头). 2．(2023·新课标Ⅱ卷)It's been an honor to watch the panda programme develop and to see the pandas settle into their new home. 3．(2023·全国乙卷)It is a distinct visual contrast(反差) that shouldn't work，but/yet somehow these two very different worlds make a good combination. 4．(2022·新高考Ⅰ卷)The GPNP is designed to reflect the guiding principle of “protecting the authenticity and integrity(完整性) of natural ecosystems, preserving biological diversity, protecting ecological buffer zones, and leaving behind precious natural assets(资产) for future generations”． 5．(2022·全国乙卷)The “First International Tea Day Tea Road Cooperative Initiative” issued(发布) at the ceremony calls for people working in the tea industry to come together to promote international cooperation and cultural exchanges. 6．(2022·新高考Ⅱ卷)He hung on for a few minutes and screamed for his father, but his father didn't hear him. 7．(2021·全国甲卷)We hired our bikes from the rental place at the South Gate.My bike was old and shaky but did the job. 8．(2021·全国甲卷)In my opinion, when/whenever in trouble, we should seek help from those we trust most. 9．(2021·全国乙卷)It was not widely accepted as a travel concept until the late 1980s. 10．(2021·全国乙卷)I also water the flowers in the yard and tidy up my own bedroom whenever necessary. 11．(2020·天津7月卷)—Why do people like pop music? I hate it so much. —Even though it is not your style, that doesn't mean it is bad. 12．(2020·上海卷)One of the earliest­known inventions is the bow and arrow, which is still used throughout the world today, 15，000 years after it was first invented. [对应学生用书P338] Passage 1 William Dunn is the founder of Take a Kid Fishing，Inc.，which is 1.__________ nonprofit organization in Lakeland，Florida.2.__________(inspire) by his strong relationship with his own father，William helps fatherless kids through the sport of fishing. Several years ago，William 3.__________(notice) his six­year­old neighbor，Camran，seemed angry.He rushed out of the house，4.__________(shout) at his mom.One day，William saw the boy outside and started a conversation.Camran shared that his dad wasn't in his life.William asked Camran's mom 5.__________ permission to take him fishing.Camran 6.__________(attract) by that first trip.The two fished together several times a week，and William saw 7.__________ (extreme) positive changes in Camran's behavior.“That's when I realized that my heart was calling me 8.__________(help) fatherless kids，” he says. Now William is teaching Camran's friends and other kids in the neighborhood to fish.Many have never been fishing or even on a boat，9.__________ William starts by teaching the basics.Then come the life lessons that fishing offers 10.__________(patient)，teamwork，and the simple joy of relaxing in the outdoors. [语篇解读]本文是一篇记叙文。文章主要讲述了William Dunn通过钓鱼运动帮助没有父亲的孩子的故事。 1．a　[解析]考查冠词。句意：William Dunn是佛罗里达州莱克兰的非营利组织Take a Kid Fishing公司的创始人。organization是可数名词，表泛指，前面加不定冠词。nonprofit以辅音音素开头，因此不定冠词用a。故填a。 2．Inspired　[解析]考查非谓语动词。句意：受他与自己父亲深厚关系的启发，William通过钓鱼运动帮助没有父亲的孩子。句中谓语是helps，空处用非谓语动词。由by可知，空处用过去分词表被动。位于句首，首字母大写。故填Inspired。 3．noticed　[解析]考查动词的时态。句意：几年前，William注意到他六岁的邻居Camran看起来很生气。由Several years ago可知，句子描述过去的事情，时态用一般过去时。故填noticed。 4．shouting　[解析]考查非谓语动词。句意：他冲出房子，冲他妈妈大喊大叫。句子的谓语是rushed，空处用非谓语动词。He和shout之间是主谓关系，因此空处用现在分词表主动。故填shouting。 5．for　[解析]考查介词。句意：William请求Camran的妈妈允许他带Camran去钓鱼。ask sb.for sth.是固定短语，意为“向某人要某物”，因此空处填介词for。故填for。 6．was attracted　[解析]考查动词的时态、语态和主谓一致。句意：Camran被第一次旅行吸引。由by可知，句子用被动语态。句子描述过去的事情，时态用一般过去时，因此空处是一般过去时的被动语态。主语Camran是单数，因此用was。故填was attracted。 7．extremely　[解析]考查副词。句意：两人每周一起钓几次鱼，William发现Camran的行为发生了非常积极的变化。空处用副词修饰形容词positive，extreme的副词是extremely，意为“非常”。故填extremely。 8．to help　[解析]考查固定搭配。句意：那时我意识到我的内心召唤我去帮助没有父亲的孩子。call sb.to do sth.是固定短语，意为“叫某人做某事”，因此空处用不定式。故填to help。 9．so/and　[解析]考查连词。句意：许多人从来没有钓过鱼，甚至没有坐过船，所以William开始教基本知识。根据语境可知，上下文是因果关系，空处用so引出后文的结果，表示“因此”，也可用and表承接。故填so/and。 10．patience　[解析]考查名词。句意：接下来是钓鱼带给我们的人生经验：耐心、团队合作以及在户外放松的简单乐趣。空处用名词作宾语，patient的名词是patience，意为“耐心”，是不可数名词。故填patience。 Passage 2 (2024·广东普通高中高三上学期调研)Sanfu usually comes between mid­July and mid­August.It refers to the three 10­day periods in the Chinese lunar calendar and 1.__________(call) “the dog days of summer” in English.It is the hottest days of the year，including 3 phases: Toufu，Zhongfu and Mofu. Chinese people have different eating 2.__________(habit) during the three periods.When the dog days just come，people tend 3.__________(lose) their appetites.It is believed that eating dumplings during Toufu refreshes people's spirit and improves their appetite.The second phase，Zhongfu，is traditionally 4.__________ time for consuming noodles because it helps people sweat and relieve inner heat.As Mofu comes，the weather gradually turns cool and people may get cold 5.__________ they keep eating noodles and sweat a lot.People，especially those 6.__________(live) in North China，eat the Chinese egg pancake instead. Except for eating，Chinese people combine traditional Chinese medicine (TCM) 7.__________ this time of the year.Sanfutie，or Sanfu patch treatment，is a bandage 8.__________(make) of traditional Chinese herbal medicine.The treatment is based on the TCM principle，which is 9.__________(effect) for coughs，asthma(哮喘) and other diseases.It is a summer solution to winter illness.Sanfu patch treatment was extremely popular in the Qing Dynasty and has enjoyed great popularity in recent years again 10.__________ more patients turn to TCM treatment. [语篇解读]本文是一篇说明文。文章主要介绍了三伏天人们的饮食习惯，以及三伏贴在三伏天时很受人们欢迎。 1．is called　[解析]考查动词的时态、语态和主谓一致。句意：它指的是中国阴历的三个10天周期，在英语中被称为the dog days of summer。空处在句中作谓语，主语it和动词call是被动关系，应用被动语态。且由refers可知，句子描述一般性事实，应用一般现在时。主语是it，be动词应用is，故填is called。 2．habits　[解析]考查名词的数。句意：中国人有不同的饮食习惯。habit是可数名词，由different可知，应用复数形式，故填habits。 3．to lose　[解析]考查非谓语动词。句意：当三伏天来临时，人们往往没有胃口。tend to do sth.是固定搭配，意为“往往会”，故填to lose。 4．a　[解析]考查冠词。句意：第二阶段，中伏，传统上是吃面条的时间，因为它可以帮助人们出汗和释放内热。此处time是可数名词，表示“一段时间”，且time以辅音音素开头，应用a，表示泛指，故填a。 5．if　[解析]考查连词。句意：随着末伏的到来，天气逐渐转凉，如果人们继续吃面条会出很多汗，这样他们可能会感冒。此处表示“如果”，应用if引导条件状语从句，故填if。 6. living　[解析]考查非谓语动词。句意：人们，尤其是那些生活在中国北方的人，吃的是中式鸡蛋煎饼。句中有谓语eat，前后无连词，此处应用非谓语动词作后置定语，修饰those。those代指those people，和live是主谓关系，应用现在分词作后置定语，表示主动，故填living。 7．with　[解析]考查介词。句意：除了吃，中国人把传统中医和一年中的这个时候结合。“combine ...with ...”是固定搭配，意为“将……与……结合起来”，故填with。 8．made　[解析]考查非谓语动词。句意：三伏贴，是一种由中草药制成的绷带。句子有谓语is，前后无连词，此处应用非谓语动词作后置定语。动词make和bandage是动宾关系，应用过去分词作后置定语，表示被动，故填made。 9．effective　[解析]考查形容词。句意：(这种)治疗是基于中医的原则，这对咳嗽、哮喘和其他疾病有效。此处应用形容词effective作表语，故填effective。 10．as/because/since　[解析]考查连词。句意：三伏贴在清代非常流行，近年来由于越来越多的患者转向中医治疗，三伏贴又重新流行起来。空处引导原因状语从句，应用连词as/because/since引导，表示“因为”，故填as/because/since。 学科网（北京）股份有限公司 $$