2026年九年级中考英语重难点语法【原因状语从句】考点提炼&专项练习

该初中英语中考复习资料聚焦“原因状语从句”专题，针对中考必考的三大引导词（because, since, as）辨析、because与because of用法区别等核心考点，采用“考点提炼+分层专项练习”的系统设计，通过表格对比引导词语气强弱与位置特点，结合记忆口诀梳理用法，再以基础单选、能力句型转换、拓展写作运用三级训练突破考点。 亮点在于“语境化辨析”和“学以致用”的教学策略，如通过“because回答why问句”“because of接名词短语”等中考高频陷阱题训练，强化学生语言理解与表达的准确性，培养思维品质。写作任务中要求用because, since, because of描述不能爬山的原因，提升语言运用能力。分层练习适配不同学生，总结建议助教师精准把控复习节奏，有效提升学生应考能力。

2026年中考英语重难点语法【原因状语从句】考点提炼&专项练习（基础达标&能力提升&拓展提优） 第一部分：考点提炼 原因状语从句用于说明主句动作或状态发生的原因，通常由从属连词引导。 核心考点一：三大引导词辨析 这是中考考查的重中之重，要求考生能准确区分和使用。 引导词 词义与语气 位置 特点与考点 because 因为 可置于主句前或后，放在主句后更常见。 语气最强，表示直接、明确的原因，是对方不知道的新信息。回答 why 的问句必须用 because。 since 既然，由于 通常置于句首。 语气较弱，表示显而易见或双方已知的原因，常译为“既然”，带有推理、说明的意味。 as 由于，因为 通常置于句首。 语气最弱，表示附带、非直接的原因，主从句因果关系不如 because 强烈。 【记忆口诀】：语气强弱：because > since > as。回答“why”用 because；说众所周知的事实用 since；表不明显原因用 as。 核心考点二：其他常见引导词 1. for： 并列连词，连接并列句，表示补充说明或推断的理由，语气最弱。for引导的句子不能放在句首。 It must have rained last night, for the ground is wet. （昨晚一定下雨了，因为地面是湿的。）【表推断】 2. now that： “既然”，相当于 since，但更侧重“由于现在的情况是...”。 Now that everyone is here, let's begin our meeting. 3. because of： 这是一个介词短语，后面接名词、代词或动名词，而不是一个完整的句子。这是中考常设的陷阱题。 正：He stayed at home because it rained heavily. 正：He stayed at home because of the heavy rain. 第二部分：专项练习 A. 基础达标（单选填空） 1. — Why were you late for school this morning? — ______ my bike was broken on the way. A. Since B. As C. Because D. For 2. ______ it is raining heavily, we have to cancel the picnic. A. Because B. Because of C. Since D. For 3. I have to leave now ______ I have a meeting in ten minutes. A. so B. because C. but D. though 4. ______ you have finished your homework, you can watch TV for a while. A. Because B. Now that C. As for D. Even though 5. She didn't go to the party ______ she was not feeling well. A. because of B. since of C. because D. as of 6. We couldn't go out for a walk ______ the bad weather. A. because B. since C. as D. because of 7. He must be ill, ______ he looks so pale. A. for B. because C. since D. as 8. ______ everybody knows about it, I don't want to talk any more. A. For B. Because C. Since D. As 【答案与解析】 1. C 回答以 Why 开头的特殊疑问句，必须用 because。 2. C 句意为“既然雨下得很大”，since 表示显而易见的原因，且常放句首。B 项 because of 后不能接句子。 3. B 前后是直接的因果关系，“离开”的原因是“十分钟后有会议”。 4. B “既然你已经做完了作业”，now that 表示由于现在的情况，符合语境。 5. C 后接句子“she was not feeling well”，所以用连词 because。A、B、D 后都不能直接接句子。 6. D 后接名词短语“the bad weather”，所以用介词短语 because of。 7. A 后句“他脸色苍白”是对前句“他一定病了”的补充说明理由，且 for 引导的句子不能放句首，符合此处语境。 8. C “既然每个人都知道了”，since 表示双方已知的原因。 B. 能力提升（句型转换与句子合并） 1. 句型转换： He didn't come to school because he was ill. (改为同义句) He didn't come to school ______ ______ his illness. 2. 句子合并： The game was put off. The weather was bad. (用 because 将两句合并为一句) The game was put off ______ ______ ______ ______. 3. 句子合并： Everyone is present. Let's start the discussion. (用 now that 合并) ______ everyone is present, let's start the discussion. 4. 改错： I like English because of it is interesting. 5.选择填空： ______ you are a college student, you should learn to be more independent. A. Now that B. Because of C. Although D. Unless 【答案与解析】 1. because of。考查 because + 句子 与 because of + 名词的转换。 2. because the weather was bad。 3. Now that。 4. I like English because it is interesting. 或 I like English because of its interest. 错误点：because of 后面不能接句子 (it is interesting)，只能接名词性成分。 5. A。句意：“既然你是一名大学生，你应该学会更独立。”表示基于现状的推论，用 now that 最合适。 C. 拓展提优（语法填空与写作运用） 一、语法填空 用适当的引导词填空（because, since, as, for, now that, because of）。 1. ______ you have made your decision, I will support you. 2.The flight was delayed ______ the heavy fog. 3.It must be morning, ______ the birds are singing outside. 4.______ I had free time, I decided to visit the museum. 5.______ the Internet is so convenient, we can find almost any information we need. 二、写作运用 请使用原因状语从句完成以下写作任务，至少使用 because, since/now that, because of 各一次。 情景： 你的好友Tom邀请你本周日一起去爬山，但你无法前往。请给他写一封邮件（约50词），说明你不能去的原因（例如：有重要的考试需要准备；天气预报说可能会下雨；最近感觉有点累等）。 范文参考： Dear Tom, Thanks for your invitation to go climbing this Sunday. However, I'm afraid I can't join you. Firstly, I have to prepare for an important exam because it will be held next Monday. Since the weather forecast says it might rain, it might not be a good day for climbing anyway. I also feel a bit tired these days because of lack of sleep. Maybe we can plan it for another weekend. Hope you have a good time! Yours, [Your Name] 【答案与解析】 一、语法填空 1. Since/Now that （既然你已经做了决定） 2. because of （后接名词短语 the heavy fog） 3. for （对前句的推断提供理由，且不能放句首） 4. As/Because （由于我有空） 5. Since/As/Now that （由于互联网如此方便） 总结与备考建议 1. 抓住核心： 深刻理解 because, since, as 的语气强弱和用法区别。 2. 警惕陷阱： 严格区分 because（连词+句子）和 because of（介词短语+名词/代词/动名词）。 3. 语境判断： 在做题时，不仅要看选项，更要理解句子的逻辑关系，选择最符合语境的引导词。 4. 学以致用： 尝试在书面表达中主动运用原因状语从句，使文章逻辑更清晰，语言更丰富。 学科网（北京）股份有限公司 $