UNIT 4 Breaking Boundaries单元知识回扣（Word教参）-【精讲精练】2025-2026学年高中英语选择性必修第二册（外研版）

该高中英语单元复习讲义通过表格和框架图系统梳理了单元知识体系，将核心单词（附语境例句）、拓展单词（含词性转换）、重点短语及重点句型按“词汇积累-派生拓展-短语应用-句型实践”的递进逻辑组织，用对比表格呈现拓展单词的原词、词性与派生词关联，清晰展现知识内在联系。 讲义亮点在于“词汇-句型-短语”一体化应用设计，如结合重点句型“It is ten years since...”设计情境仿写题，引导学生运用核心单词“boundaries”“vital”等完成句子，培养语言能力和思维品质。拓展单词部分提供“词根词缀+语境记忆”方法指导，基础薄弱学生可掌握词性转换规则，优秀学生能拓展词汇网络，教师可依托资料实施分层词汇句型训练，提升复习效率。

[对应学生用书P95] Ⅰ.核心单词 1．Scientists continue to push back the boundaries(边界) of human knowledge. 2．Statistics(数据) show that the average number of births per woman has fallen from 4.9 in the early 1960s to 2.5 nowadays. 3．A nap can leave you feeling refreshed and more ready to tackle(处理) the task at hand. 4. The twins(双胞胎) were filled with excitement as they thought of the surprise they were planning for Mother's Day. 5．The moving love story unfolds against a background of civil (国内的) war. 6．As he mounted (登上) the stage，the entire audience broke into loud applause. 7．The clinic (诊所) is open to outsiders as well as employees and their families. 8．We were not altogether(完全地) sure that the comet would miss the Earth. 9．It is vital (重要的)that we should remember the new words when learning English. 10．The patient is not allowed to go out of the ward (病房)because he is too weak. 11．It requires the joint (联合的) efforts of the whole society to build a harmonious society. 12．Nurses need to disinfect (为……消毒)the medical instruments before the operation. 13．The right to vote should be a liberty (自由) enjoyed by all citizens，regardless of their gender，race，religion，or social status. 14．These scientists have made great advances in satellite technology，which I suppose is of great significance to all mankind (人类). 15．He has cast (选派) her as an ambitious lawyer in his latest movie，which will be released at the end of the year. Ⅱ.拓展单词 1．assist v.协助，帮助→ assistance n.帮助，援助→ assistant n.助手 2．special adj.特殊的；专门的→specialist n.专家→specialize vi.专攻；专门从事；专注于 3．infect vt.传染；感染→infectious adj.传染性的→infection n.传染；传染病；感染 4．devote v.奉献；致力于→devotion n.奉献→devoted adj.忠诚的；挚爱的 5．real adj.真正的→really adv.真正地→reality n.现实→realize vt.实现→realistic adj.(目标、希望)能够实现的 6．minor adj.小的→minority n.少数派，少数 7．harmony n.和睦，和谐→harmonious adj.和睦的，融洽的→harmoniously adv.和睦地，和谐地 8．reward n.&v.奖赏；酬劳；获得；赢得→rewarding adj.值得做的，有意义的 9．divide vt.分割；分配→ division n.分歧；分裂 10．noble adj.崇高的，高尚的→nobly adv.高尚地，崇高地 11．influence n.& v.影响→influential adj.有影响力的 12．communist adj.共产主义的 n.共产主义者→communism n.共产主义 Ⅲ.重点短语 1．take any chances 心存侥幸；冒险 2．put...at risk把……置于危险之中 3．give up on对……绝望；对……不抱希望 4．against all odds尽管凶多吉少，尽管极其困难 5．step into sb's shoes接替某人(的职责或工作) 6．in memory of纪念；追念 7．at a great cost付出巨大代价 8．suffer for为……而受苦 9．look to展望；指望 10．die for为……而献身 11．bring forth使产生，使出现 12．dedicate to 献身；把(时间、精力等)用于 13．be engaged in从事；忙于 14．in a larger sense从更广泛的意义上来说，从更大的角度 15．in vain 徒劳，无结果，白白地 Ⅳ.重点句型 1．(句型公式)It is/has been＋一段时间＋since... 自从我从这所学校毕业以来已经十年了，我仍然非常想念我的同学和老师。 It is ten years since I graduated from this school，and I still miss my classmates and teachers very much. 2．(句型公式)It's up to sb to do 我们是否有必要买这本参考书由你决定。 It's up to you to decide if it is necessary for us to buy this reference book. 学科网（北京）股份有限公司 $