It's形容词 to do sth for sb-2025-2026学年八年级英语上册句型全解（沪外版）

初二上册沪外版 【同步精讲】 A版句型全解 同步精讲 【A版句型全解】It's+形容词+to do sth: for sb. 初中·沪外版·初二上册 基本结构 句型结构：Itis+形容词+to do sth.for sb. 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(me/him/her/them等) 例句展示： It is necessary to buy a gift for her.(给她买份礼物是有必要的) It is helpful to carry the books for them.(帮他们搬书是有帮助的) 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l: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沪外版初二上册同步练习) It is dangerous_ children to play with fire 初二上册沪外版 【同步精讲】A版句型全解 A.of B.for C.with D.at 答案：B 解析：dangerous描述“玩火”这件事的性质，不修饰人，用for (2023沪外版初二上册单元测试) It's very nice you to invite us to the party. A.of B.for C.to D.with 答案：A 解析：nice描述人的品质，”you are nice”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 easy for him to solve the problem. 同义句：To solve the problem is easy for him, 例句2：原句It is silly of Tom to believe the stranger. 同义句：To believe the stranger is silly of Tom, 真题再现(2024沪外版初二上册期中测试) It is important for us to protect the environment.(改为同义句) the environment is important for us. 答案：To protect 初二上册沪外版 【同步精讲】A版句型全解 (2023沪外版初二上册期末复习卷) It is kind of you to help the homeless dog.(改为同义句) the homeless dog is kind of you 答案：To help 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 difficult for her to pass the exam. 问句：How is it for her to pass the exam? 规则2：对sb.提问→用Who+be+it+adj.+for/of+to do sth.? 例句：原句It is kind of Lucy to help the poor boy. 问句：Who is it kind of to help the poor boy? 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 meaningful for us to join the volunteer activity. 间句：What is it meaningful for us to do? 真题再现(2023沪外版初二上册课堂练习) It is very interesting for us to play chess.(对划线部分提间) it for you to play chess? 答案：How is (2024沪外版初二上册期末测试) It is foolish of him to waste time on games.(对划线部分提问) is it foolish of waste time on games? 答案：Who;to 句型综合训练 训练1：单项选择（考察for/of辨析） 初二上册沪外版 【同步精讲】 A版句型全解 1.It is clever my brother to get the first prize in the contest. A.of B.for C.to D.about 2.It is impossible people to live without water or air. A.of B.for C.from D.with 3.It's rude him to speak to his parents like that. A.of B.for C.at D.in 4.It is necessary us to take notes carefully in class. A.of B.for C.on D.with 5.It is brave the firefighter to rush into the burning building. A.of B.for C.with D.to 6.It is important students to learn English well A.of B.for C.with D.about 7.It is kind you to share your toys with others. A.of B.for C.at D.in 初二上册沪外版 【同步精讲】 A版句型全解 8.It is dangerous children to swim in the deep river alone. A.of B.for C.from D.to 训练2：同义句转换（考察句型变形) 1.It is polite for us to greet our teachers every momning. → our teachers every morning is polite for us. 2.It is foolish of him to refuse the advice. the advice is foolish of him. 3.It is necessary for students to take physical education classes. physical education classes is necessary for students. 4.It is kind of Lily to help the old man cross the street. the old man cross the street is kind of Lily. 5.It is difficult for me to work out this math problem. → out this math problem is difficult for me. 6.It is important for us to protect wild animals. → wild animals is important for us. 7.It is silly of Tom to make such a mistake. such a mistake is silly of Tom. 8.It is easy for her to finish the work on time. the work on time is easy for her. 训练3：完成句子（考察语境运用） 1.对我们来说，平平安安地回家很重要。 →It is important go home safely. 2.你真是太勇敢了，救了那个落水的孩子。 →It is brave save the child who fell into the water. 3.对我们来说，遵守交通规则很有必要。 →It is necessary follow the traffic rules. 5 初二上册沪外版 【同步精讲】 A版句型全解 4.她真的很慷慨，捐出了自己的全部积蓄。 →It is generous donate all her savings. 5.对我们来说，养成良好的习惯很重要。 →It is important develop good habits. 6.对于学生而言，按时完成作业是必要的。 →It is necessary finish homework on time. 7.他帮助那位盲人过马路，真是太好了。 →It is kind help the blind man cross the road. 8.对孩子们来说，每天吃水果和蔬菜是有益的。 →It is good eat fruits and vegetables every day. 9.她花这么多时间照顾生病的奶奶，真是太孝顺了。 →It is filial spend so much time looking after her sick grandma 10.对我们来说，学习一门外语是有用的。 →It is useful learn a foreign language. 训练4：写作高级句式（考察翻译与挖空） 1.每天阅读半小时对我们来说很有帮助。 →It is helpful read for half an hour every day. 2.他放弃了这么好的机会，真是太傻了。 →It is silly give up such a good chance. 3.对每个人来说，保持健康的生活方式都很重要。 →It is important keep a healthy lifestyle. 4.我的朋友在我遇到困难时帮助我，他真是太好了。 →It is kind help me when I was in trouble 5.对学生们来说，参加课外活动很有意义。 →It is meaningful take part in after-school activities. 6.她在公共汽车上给老人让座，真是有礼貌。 →It is polite offer her seat to the old on the bus. 6 初二上册沪外版 【同步精讲】A版句型全解 参考答案 1训练1：单项选择 1.A2.B3.A4.B5.A6.B7.A8.B Ⅱ训练2：同义句转换 1.To greet 2.To refuse 3.To take 4.To help 5.To work 6.To protect 7.To make 8.To finish ⅡL.训练3：完成句子 1.for us to 2.of you to 3.for us to 4.of her to 5.for us to 6.for students to 7.of him to 8.for children to 9.ofher to 10.for us to V.训练4：写作高级句式 1.for us to 2.of him to 3.for everyone to 4.of my friend to 5.for students to 6.of her to 7