高中英语语法知识点总结-状语从句（原因、目的、结果状语从句）讲义-2026届高三英语上学期一轮复习专项

状语从句（原因、目的、结果状语从句） 第一部分 原因状语从句： 知识点1：原因状语从句连词 知识点2：表原因的短语 知识点3：写作句式升级 一、原因状语从句连词 原因状语从句的连词： because, for, as, since/now that becasue 最正式，语气最强，只有because才有资格回答why。 -Why did Tang monk refuse the queen? -He refused the queen because he is a buddist. as 表示“因为，由于”，用于显而易见的原因。 As the Monkey king knew she was a monster, he killed her three times. since/now that 表示“既然”，语气较弱，用于显而易见的原因。 但是，需要注意的是，now that 强调先后顺序，即先有了从句的情况，才有主句的情况。 Now that our master has been taken, let’s get dismissed . Let’s get dismissed now that our master has been taken. for 表示推断的理由，注意for链接并列句，不可位于句首。 She couldn’t have finished the task so quickly, for it was extremely difficult. 二、表示原因的短语 表示原因的短语： because of, owing to, due to, thanks to because of 由于，因为 +名词（短语）/doing owing to due to thanks to 幸亏，对亏了，由于…… The soldiers finally won the victory of the war because of their firm beliefs. The soldiers finally won the victory of the war owing to their firm beliefs. The soldiers finally won the victory of the war due to their firm beliefs. The soldiers finally won the victory of the war thanks to their firm beliefs. 三、原因状语从句小总结： 1、原因状语从句连词 内涵 语气 能否回答why 位置 能否被强调 小总结 because 直接原因 强 能 主句前或后均可 能 最正式，回答why for 解释说明 弱 不能 主句后 不能 表推断的理由，不能放在句首 as 双方都知道的，不言自明的原因 弱 不 主句前（多）或后 不能 显而易见的原因 since/now that because和because of 的区别* He didn’t go to school because he was ill. Since/Now that/ As he can’t answer the question, you may ask someone does. It must have rained last night, for the ground is so wet. Since/Now that everybody knows about it, I don’t want to talk any more. The plane was held up because of the bad weather. 2、注意区分 because of 由于，因为 +名词（短语）/doing owing to due to thanks to 幸亏，对亏了，由于…… 3、 as 表示“由于”，引导原因状语从句 表示“正如”引导定语从句 表示“随着”，引导时间状语从句 表示“作为”，介词 四、写作升级 1、熟悉用法，避免连词混用。 连词混用错误： ×：Because he was tired, so he went to bed early.（中文思维，because与so不可连用） √：Because he was tired, he went to bed early. 或 He was tired, so he went to bed early. 逻辑模糊问题： ×：We should exercise because it’s good.（原因笼统，缺乏具体性） √：We should exercise because it strengthens our bodies and reduces stress. （原因具体，逻辑清晰） 位置不当问题： ×：For the weather was bad, we canceled the picnic. （for不可放句首，改用as/because） √：As the weather was bad, we canceled the picnic. 2、适用文体 ①议论文（观点论证） 核心需求：用原因解释观点合理性。 基础结构：观点句+ because/since引导的原因从句。 例：Volunteering is meaningful because it helps others and enriches our own experience. （志愿服务很有意义，因为它帮助他人且丰富自身经历。） 进阶技巧：用 “since+常识性原因” 引出论点，增强说服力。 例：Since teamwork is vital in modern society, students should learn to cooperate with others.（既然团队合作在现代社会至关重要，学生应学会与人协作。） ②记叙文（事件描述） 核心需求：说明行为动机或事件背景。 用as衔接场景性原因，让叙事更自然。 例：As my little sister was crying, I decided to tell her a story to cheer her up. 因为妹妹在哭，我决定给她讲故事让她开心。 用for补充结果的隐含原因，增加细节层次。 例：I felt proud of myself, for I had overcome the fear and finished the speech. 我为自己感到骄傲，因为我克服了恐惧并完成了演讲。 ③应用文（书信/建议信） 核心需求：清晰说明建议或请求的原因。 用because解释具体原因，让诉求更合理。 例：I suggest we hold the activity outdoors because fresh air will make it more enjoyable. 我建议户外活动，因为新鲜空气会让活动更愉快。 第二部分 目的状语从句 知识点1：so that / in order that 知识点2：in case/ for fear that 知识点3：写作句式升级 一、目的状语从句 1、 引导词： so that, in order that, in case, for fear that 2、从句谓语特点： 与so that和in order that 连用，多用can/could/may/might 主从句位置：主句在前，从句在后。 目的状语：to do, in order to do, so as to do, so that（不放在句首） 我早起是为了赶上早班车。 →I get up early so that I can catch the early bus. 2、 so that/ in order that so that/ in order that以便……;为了……”, 其引导的状语从句中谓语常用“情态动词+动词原形”。 in order that比so that更为正式, 引导的状语从句可置于主句之前或之后;而so that引导的从句一般置于主句之后。 In order that we could get there on time, we should set out early. Speak louder so that/ in order that the audience can hear you. 注意：当主从句的主语一致时，so that和in order that引导的目的状语从句均可以转换成in order to或so as to结构。 We got up early so that we could arrive in time. （so that 后面加的是句子） →We got up early so as to arrive in time. （so as to 后面加的是动词原形） 为了能及时赶到,我们起得很早。 Lucy saved money in order that she could buy a car. （in order that 后面加的是句子） →Lucy saved money in order to buy a car. （in order to 后面加的是动词原形） 露西攒钱是为了买辆车。 为了；以便 目的状语 In order to + 动词原形 so as to + 动词原形 （不能放在句首） 目的状语从句 In order that + 从句 so that + 句子（不能放句首） 3、 in case/ for fear that 1、for fear that / in case：意为“以防，以免”，后面加句子。 She often worried for fear that the child would be hurt.她经常忧虑,生怕孩子受伤。 It’s a good idea to choose an alternative destination in case your first-choice tourist spot is not available. 多加一个备选目的地是一个好主意，以免你首选的旅游景点去不了。 四、写作句式升级 1、 易错点 ①否定形式： in order to/so as to的否定：在to前加not（in order not to/so as not to）。 从句否定：在情态动词后加 not（如in order that students may not make mistakes）。 ②时态呼应： in case that/for fear that 从句用一般现在时表将来（如 I’ll take a coat in case it gets cold.）。 ③句首位置： 仅in order to和in order that可放句首，so as to/so that一般不用于句首（避免语法错误）。 2、句子优化 ①学习类话题（如 “如何提升能力”） 基础表达：I review notes every day. I want to remember knowledge. 升级表达：I review notes every day in order to remember knowledge better. （用in order to连接） 进阶表达：I review notes every day so that I can remember knowledge better for the final exam.（用so that +情态动词表目的） 预防类场景：We take notes carefully. We may forget key points. 升级表达：We take notes carefully in case that we forget key points.（in case that 表 “以防遗忘”） 进阶表达：We take notes carefully for fear that we might forget key points in the exam. （for fear that + might 增强担忧语气） ②生活类话题（如 “环保” “健康生活”） 目的表达：We should save water. We want to protect the environment. 升级表达：In order to protect the environment, we should save water in daily life. （句首用 in order to 强调目的） 预防表达：We should carry umbrellas. It may rain this afternoon. 升级表达：We should carry umbrellas in case of rain this afternoon.（in case of +名词） 进阶表达：We should carry umbrellas in case that it rains this afternoon.（in case that +句子） ③社会类话题（如 “志愿服务” “团队合作”） 目的表达：Volunteers help the elderly. They want to make them feel warm. 升级表达：Volunteers help the elderly so as to make them feel warm in their daily life. （句中用 so as to） 担忧预防表达：We should communicate more in teams. Misunderstandings may happen. 升级表达：We should communicate more in teams for fear that misunderstandings might happen.（for fear that +情态动词 might 表可能性） 第三部分 结果状语从句 知识点1：结果状语从句的引导词 （so that, so…(adj./ adv.)…that, such…(n.)…that） 知识点2：so / such 的辨析 一、引导词: so that, so…(adj./ adv.)…that, such…(n.)…that He is such as clever boy that we all like him. Such a clever boy is he that we all like him, ① So adj./adv. that….如此……以至于 Such (n.).…. that… so, such 放句首时，需要部分倒装，that后不倒装 He is so clever that we all like him. So clever is he that we all like him. ② He earned so little money that he couldn’t support his family. It’s not surprising that such little worms eat so little grain. ③ 其他结果状语 too…to… 太而不能 adj./adv. enough to do 足够…而能 so…(adj./adv.)…as to do 如此…以至于… too… to do 心情，心境，心理活动：ready, eager, satisfied, kind, willing, anxious, happy We are too happy to live in China. I’m too willing to see Peng Yuyan. 3、 so / such 的辨析 so+形容词/副词+that so+形容词+a/an+可数名词单数+that从句 so+ many（多）/few（少）+可数名词复数+that从句 so+ much（多）/little（少）+不可数名词+that从句 such+a/an+形容词+可数名词单数+that从句 such+形容词+可数名词复数/不可数名词+that从句 He is so experienced a worker that we all believe in him. =He is such an experienced worker that we all believe in him. 他是一位很有经验的工人，我们都信任他。 There was so little time left that we had to run all the way so that we could catch the last bus. 剩下的时间如此少，以至于我们不得不一路奔跑，以便能赶上最后一班公交车。 He is such a little boy that he can’t tie his shoes yet. 他还是个这么小的男孩，还不会系鞋带。 口诀： 名前such，形副so， 多多少少也用so， （many, much, little, few） little一词特殊记， “小”用such，“少”用so。 1 学科网（北京）股份有限公司 $$