句型全解04-2025-2026学年高中英语必修二句型全解（重大版）

高中重大版 【寒假专版】A版句型全解 寒假专版 【A版句型全解】It is our duty to do sth 高中·重大版·必修第二册 基本结构 句型结构：It is our duty to do sth It为形式主语，真正主语是后置的不定式短语to do sth;our duty表示“我们的责任”，用于 强调某行为是主体应尽的义务。 例句展示： It is our duty to protect the environment.(保护环境是我们的责任) It is our duty to respect our parents and teachers.(尊敬父母和老师是我们的责任) 句型精讲（核心考法） 考法1：不定式逻辑主语的判断与介词搭配（高中高频考点) 判断规则+例句对比 规则1：当形容词描述不定式动作(to do sth.)的性质、特征或客观情况（如important,.nec essary,essential,,vital,difficult,easy等)时，逻辑主语前用介词for It is essential for us to master basic computer skills in the digital age. 验证：”Master basic computer skills is essential''逻辑通顺，强调动作的必要性 规则2：当形容词描述逻辑主语(sb.)的品质、性格或特征（如responsible,wise,foolish,brave, considerate等)时，逻辑主语前用介词of It is responsible of you to inform the teacher about the accident immediately. 验证：You are responsible'”逻辑通顺，强调人的品质 真题再现(2024重大版必修第二册单元检测) It is crucial students to develop critical thinking abilities in senior high school. A.of B.for 1 高中重大版 【寒假专版】 A版句型全解 C.to D.with 答案：B 解析：crucial描述”develop critical thinking abilities”这件事的必要性，不直接修饰人，用for 真题再现(2023重庆高考模拟题) It was brave the firefighter to rush into the burning building to save the child A.of B.for C.with D.by 答案：A 解析：brave描述消防员的品质，'the firefighter is brave'”逻辑通顺，用of 考法2：句型的高级同义转换（写作应用） 转换规则+例句转换 规则1：保留形式主语t,将不定式短语后置改为动名词短语作真正主语，结构为Itis+adj: +for/ofsb.+doing sth.(注意：部分形容词如no good,,no use只能接动名词) 例句l:原句It is useless for us to argue with unreasonable people. 同义句：It is useless for us arguing with unreasonable people. 规则2：使用Sb.consider/think/find it+adj.+to do sth.”结构，将形式宾语it前置，真正宾 语不定式后置 例句2：原句It is meaningful for teenagers to participate in social voluntary work. 同义句：Teenagers find it meaningful to participate in social voluntary work. 真题再现(2024重大版必修第二册写作专项) It is our duty to safeguard national security.(用consider改写句子) We our duty to safeguard national security. 答案：consider it 真题再现(2023四川高考模拟题) 高中重大版 【寒假专版】 A版句型全解 It is important for citizens to abide by traffic regulations.(改为含动名词的同义句) It is important for citizens traffic regulations. 答案：abiding by 考法3：句型在复杂语境中的应用（阅读理解长难句分析） 识别规则+例句解析 规则1：当句中出现多个不定式短语时，需通过逻辑关系判断哪个是真正主语，通常距离形 容词最近的不定式为真正主语 It is necessary for the government to take measures to reduce environmental pollution. 解析：句中'to take measures'”是真正主语，"to reduce environmental pollution'”是目的状语，该句可 拆解为'To take measures is necessary for the government to reduce environmental pollution.” 规则2：在含有插入语的复合句中，需忽略插入语识别基本句型结构 It is,as we all know,our duty to protect endangered species from extinction. 解析：忽略插入语”as we all know',核心结构为'It is our duty to protect endangered species' 真题再现(2024重大版必修第二册期末阅读改编) It is generally accepted that it is our responsibility to preserve historical and cultural heritage for fu- ture generations.(找出句中作真正主语的不定式短语) A.to preserve historical and cultural heritage B.for future generations C.It is generally accepted D.that it is our responsibility 答案：A 解析：句中第二个it为形式主语，真正主语是后置的不定式短语'to preserve historical and cul-- tural heritage'” 真题再现(2023全国卷阅读理解C篇) It was of great significance for the research team to discover the new energy source which can re- place fossil fuels..(分析句中逻辑主语与形容词的关系) A.significance描述research team的品质 B.significance描述discover the new energy source的重要性 C:great修饰research team 3 高中重大版 【寒假专版】A版句型全解 D.can replace是谓语动词 答案：B 解析：句中”of great significance'”相当于形容词significant,.描述discover the new energy source”这 件事的重要性，逻辑主语是research team,用介词for连接 考法4：与强调句型的混合辨析 区分规则+例句对比 规则I:It is/was+adj.+for/of sb.+to do sth.是主系表结构，其中It是形式主语 规则2：It is/was+被强调部分+that/who+其他部分是强调句型，去掉It is/was.that/who后句子仍 完整 例句l(原句型)：It is our duty to help the elderly in need. 例句2（强调句型）：It is our duty that we should help the elderly in need..（强调表语our duty) 真题再现(2024重大版必修第二册语法填空) It is our duty help)those who are in trouble.(用所给词的适当形式填空) 答案：to help 解析：该句是主系表结构，缺少真正主语，应用不定式to help作主语 真题再现(2023北京高考语法填空改编) It is our duty that we must spare no effort to achieve our goals.(填入适当的词) 答案： 解析：该句是强调句型，强调表语our duty,结构完整，不填介词（注：原题此处无需填介 词，强调句型中被强调部分为名词短语时直接连接) 句型综合训练 训练1：单项选择（考察for/of辨析） 4 高中重大版 【寒假专版】A版句型全解 1.It is kind Lucy to share her toys with friends. A.of B.for C.with D.about 2.It is easy children to learn new languages. A.of B.for C.from D.in 3.It's careless him to lose his wallet again. A.of B.for C.at D.on 4.It is important students to study hard every day. A.of B.for C.to D.with 5.It is honest the boy to return the lost money. A.of B.for C.with D.by 训练2：同义句转换（考察句型变形） 1.It is good for us to do morning exercises. momning exercises is good for us. 2.It is silly of her to believe such a story. such a story is silly of her. 3.It is useful for us to learn English well. English well is useful for us. 4.It is helpful of Tom to carry the heavy box for me. 5 高中重大版 【寒假专版】 A版句型全解 the heavy box for me is helpful of Tom. 5.It is interesting for kids to play games. games is interesting for kids. 训练3：完成句子（考察语境运用） 1.对他来说，按时完成作业很必要。 →It is necessary finish homework on time. 2.她真是太聪明了，解出了这道难题。 →It is clever work out this difficult problem. 3.对我们来说，保持健康很重要。 →It is important keep healthy. 4.他们真善良，帮助了无家可归的老人。 →It is kind help the homeless old man 5.对学生来说，认真听讲很有必要。 →It is necessary listen carefully in class 训练4：写作高级句式 1.帮助他人是我们的责任。 →It is our duty others. 2.保护环境对我们来说很重要。 →It is important protect the environment. 3.她总是乐于助人，这很体贴。 →It is considerate always be ready to help others. 4.努力学习对学生来说是必要的。 →It is necessary study hard. 5.遵守校规是每个学生的责任。 →It is the duty student follow the school rules. 6 高中重大版 【寒假专版】A版句型全解 参考答案 1训练1：单项选择 1.A2.B3.A4.B5.A Ⅱ训练2：同义句转换 1.To do 2.To believe 3.To learn 4.To carry 5.To play ⅡI训练3：完成句子 1.for him to 2.of her to 3.for us to 4.of them to 5.for students to V.训练4：写作高级句式 1.to help 2.for us to 3.of her to 4.for students to 5.of every,to