It's 名词 to do sth-2025-2026学年八年级英语下册句型辨析（北师大版）

初二下册北师大版 【句型精讲】 It's+名词+to do sth 句型精讲 【句型辨析】t's+名词+to do sth结构精 讲 初中英语·北师大版初二下册 句型辨析精讲 辨析一It's+名词+to do sth vs It's+adj+to do sth 维度 It's+名词+to do sth It's adj to do sth 核心含义强调做某事是一种“事物概 强调做某事的“性质/特征” 念” 中心成分 名词（如duty.honor,pleasure形容词（如important,easy, 等) necessary等) 逻辑侧重 主语从句“to do sth”的内容表语形容词描述主语从句“to 等同于表语名词 do sth”的属性 例句对比 It's our duty to help others..(帮助他人是“责任”这一事物) It's important to help others..(帮助他人具有“重要”的性质) 真题链接（北师大版初二下册期末真题） It's a to join the English club and practice speaking. A.pleasure B.important C.difficult 答案：A解析：句中t's后接不定冠词a,需接可数名词，pleasure为名词“乐事”；B、C为形容 词，前需用be动词+ad结构，排除，选A。 初二下册北师大版 【句型精讲】 It's+名词+to do sth 辨析二It's+名词+to do sth vs To do sth+be+名词 维度 It's+名词+to do sth To do sth+be+名词 句式功能形式主语句，t作形式主语 不定式直接作主语，语序更正 式 语气侧重口语化，日常表达常用 书面化，强调主语“to do sth” 的内容 结构特点t占位避免头重脚轻 主语较长时可能导致句子不 平衡 例句对比 It's a good habit to read books every day.（日常表达，it形式主语) To read books every day is a good habit..(正式书面语，不定式直接作主语) 真题链接（北师大版初二下册同步练习） is our tradition to celebrate the Spring Festival with family. A.It B.This C.To do 答案：A解析：句中真正主语是“to celebrate.family”,为避免头重脚轻，用it作形式主语，构 成It's+名词+to do sth结构，选A。 辨析三It's+名词+to do sth vs It's no use/good+doing sth 维度 It's+名词+to do sth It's no use/good doing sth 固定搭配 名词多为抽象概念（如duty 仅用于固定句型“n0use/no honor,.mistake等) g0od”,表“做某事无用/无益” 非谓语形式后接不定式(todo) 后接动名词(doing) 含义区别 陈述“做某事是某事物” 强调“做某事没有意义/价值” 例句对比 It's a mistake to copy others'homework.(抄作业是“错误”这一行为) It's no use crying over spilt milk.(覆水难收，哭是“无用的”) 真题链接（北师大版初二下册月考真题） 2 初二下册北师大版 【句型精讲】 It's+名词+to do sth It's noarguing with him-he never listens. A.use B.useful C.to use 答案：A解析：固定句型It's no use doing sth表“做某事无用”，no后接名词use:useful为形容 词，需用It's useful to do sth结构，排除B:to use为不定式，不符合句型搭配，选A。 综合训练 1.It's ato help the elderly cross the street. A.pleasure B.important C.difficult 2.is a good idea to learn English by watching movies. A.It B.This C.To do 3.It's no complaining about the weatherwe can't change it. A.use B.useful C.to use 从It's+名词+to do sth/To do sth+be+名词/It's no use+doing sth中选择合适的结构完成句子 1.(帮助他人)is a kind act.(用书面化结构) 2.(每天锻炼is our family rule.(用形式主语句型) 3. (about small things-let's solve the problem peacefully. 1.To read English aloud every morning is a good habit.(用形式主语句型改写) 3 初二下册北师大版 【句型精讲】It's+名词+to do sth 2.It's a mistake to waste time..(改为强调“做某事无用”的句型) 阅读短文，选择合适的句型填空，使短文通顺连贯 Hello,everyone!!As a student,_(努力学习)is our duty.My teacher often says,.”_(制定学习计划 is important for success.”However,.some students think_(拖延作y业)is okay..But in fact,__(拖a延)no good-we should finish tasks on time. I单项选择 1.A2.A3.A Ⅱ.选短语填空 1.To help others 2.It's a good habit to exercise every day 3.It's no use arguing II句型转换 1.It's a good habit to read English aloud every morning. 2.It's no use wasting time. V.语篇填空 1.It's our duty to study hard 2.To make a study plan 3.It's a mistake to put off homework 4.It's no use procrastinating 4