It's necessary for sb to do sth-2025-2026学年九年级英语全一册句型全解（北师大版）

九年级全一册北师大版 【核心句型专版】 A版句型全解 核心句型 【A版句型全解】t's necessary for sb to do sth 初中·北师大版·九年级全一册 基本结构 句型结构：It's necessary for sb.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. sb.为人称代词时需用宾格形式(mne/him/her/them等) 例句展示： It's necessary for students to follow the school rules..（对学生来说，遵守校规是必要的) It's necessary for us to study hard for the exam.（对我们来说，为考试努力学习是必要的) 句型精讲（核心考法） 考法1：区分for与of的用法（中考高频考点) 判断规则+例句对比 规则1：形容词描述to do sth.这件事的性质或特点（如difficult,.easy,important,necessary, possible等)→用for 例句：It is necessary for students to finish homework on time.. 验证：Students are necessary逻辑不通 规则2：形容词描述sb.的品质或性格（如kind,nice,clever,foolish,polite,.brave等)一用 of 例句：It is polite of her to give seats to the old. 验证：She is polite逻辑通顺 真题再现(2024北师大版九年级全一册配套中考模拟题) It is necessary us to learn English well. 九年级全一册北师大版 【核心句型专版】A版句型全解 A.of B.for C.with D.at 答案：B 解析：necessary描述”学好英语”这件事的性质，不修饰人，用for 真题再现(2023北师大版九年级全一册单元测试) It's very kind you to help me with my math. A.of B.for C.to D.with 答案：A 解析：kind描述人的品质，”you are kind'逻辑通顺，用of 考法2：句型的同义句转换 转换规则+例句转换 规则：去掉形式主语It,保留形容词，将for/of sb.中的sb.作为句子主语，结构变形为To do sth.is+adj.+for/ofsb.(不定式短语作主语时，谓语动词用单数) 例句l:原句It is necessary for her to study hard. 同义句：To study hard is necessary for her. 例句2：原句It is brave of Lily to save the cat from the fire. 同义句：To save the cat from the fire is brave of Lily. 真题再现(2024北师大版九年级全一册同步练习) It is necessary for them to follow the rules..(改为同义句) the rules is necessary for them. 答案：To follow 九年级全一册北师大版 【核心句型专版】A版句型全解 真题再现(2023北师大版九年级全一册期中测试改编) It is clever of him to work out the math problem.(改为同义句) out the math problem is clever of him. 答案：To work 考法3：对句型中不同成分提问 提问规则+例句提问 规则1：对形容词提问→用How+be+it+for/ofsb.+to do sth.? 例句：原句It is necessary for me to finish the task today. 间句：How is it for you to finish the task today? 规则2：对sb.提问→用Who+be+it+adj.+for/of+to do sth.? 例句：原句It is necessary for Tom to prepare for the exam. 间句：Who is it necessary for to prepare for the exam? 规则3：对不定式短语提问→用What+be+it+adj.+for/ofsb.+todo? 例句：原句It is necessary for us to protect wild animals. 间句：What is it necessary for us to do? 真题再现(2023北师大版九年级全一册期末测试改编) It is necessary for them to read English every morning.(对划线部分提问) it for them to read English every morning? 答案：How is 真题再现(2024北师大版九年级全一册名校调研题) It is necessary for Mary to take notes in class.(对划线部分提问) is it necessary for take notes in class? 答案：Who;to 句型综合训练 训练1：单项选择（考察for/of辨析） 九年级全一册北师大版 【核心句型专版】A版句型全解 1.It is clever my sister to solve the puzzle in 5 minutes. A.of B.for C.to D.about 2.It is important teenagers to learn basic life skills A.of B.for C.from D.with 3.It's polite you to hold the door for the disabled. A.of B.for C.at D.in 4.It is possible us to finish the project before Friday. A.of B.for C.on D.with 5.It is foolish him to spend all his money on video games. A.of B.for C.with D.to 6.It is easy children to understand this story. A.of B.for C.about D.by 7.It's kind my neighbor to help me take care of my pet A.of B.for C.in D.on 九年级全一册北师大版 【核心句型专版】A版句型全解 8.It is necessary everyone to protect the environment. A.of B.for C.to D.from 训练2：同义句转换（考察句型变形） 1.It is important for us to protect wild animals. → wild animals is important for us. 2.It is brave of him to jump into the river to save the girl. into the river to save the girl is brave of him. 3.It is necessary for them to attend the meeting on time. the meeting on time is necessary for them. 4.It is polite of Mary to say"thank you"to the waiter. "thank you"to the waiter is polite of Mary. 5.It is difficult for me to learn a new language in three months. → _a new language in three months is difficult for me 6.It is wise of the manager to make this decision → this decision is wise of the manager. 7.It is easy for students to use the new software. the new software is easy for students 8.It is important for parents to communicate with their children with their children is important for parents. 训练3：完成句子（考察语境运用） 1.对她来说，每天练习钢琴很有必要。 →It is necessary practice the piano every day. 2.他真聪明，想出了这么好的主意。 →It is clever come up with such a good idea. 3.对我们来说，保持健康的饮食习惯很重要。 →It is important keep a healthy eating habit. 5 九年级全一册北师大版 【核心句型专版】A版句型全解 4.她真善良，主动帮助那些有困难的人。 →It is kind offer help to those in need. 5.对学生来说，每天做运动有益处。 →It is beneficial do exercise every day. 6.我们遵守学校的规章制度是必要的。 →It is necessary follow the school rules. 7.你能在这么短的时间内完成任务，真是太棒了。 →It is great finish the task in such a short time. 8.对每个人来说，终身学习都很重要。 一It is important keep learning all their lives. 训练4：写作高级句式（考察翻译与挖空) 1. 每天阅读英语报纸对我们提高英语水平是必要的。 →It is necessary read English newspapers every day to improve our English. 2.他主动帮助老人过马路，真是太有礼貌了。 →It is polite offer to help the old man cross the street. 3.对孩子们来说，从小养成良好的阅读习惯是有益的。 →It is beneficial」 develop good reading habits from an early age. 4.她在困难面前从不放弃，真是太勇敢了。 →It is brave never give up in the face of difficulties. 5.我们团队合作完成这个项目是可能的。 →It is possible finish this project by working as a team. 参考答案 I训练1：单项选择 1.A2.B3.A4.B5.A6.B7.A8.B IL.训练2：同义句转换 1.To protect 2.To jump 3.To attend 4.To say 5.To learn 6.To make 7.To use 8.To communicate L训练3：完成句子 6 九年级全一册北师大版 【核心句型专版】A版句型全解 1.for her to 2.ofhim to 3.for us to 4.of her to 5.for students to 6.for us to 7.of you to 8.for everyone to V.训练4：写作高级句式 1.for us to 2.of him to 3.for children to 4.of her to 5.for us to 7