Unit 2 SectionA Grammar 语法 It is (was) + adj. 句型 课件 2026-2027学年人教版英语九年级上册

该初中英语课件系统梳理了it作形式主语的核心语法知识，涵盖不定式结构（It is/was + adj. + (for/of sb.) + to do sth.）和that从句结构（It is/was + adj./n./done + that从句等），通过句型分类、形容词列表、例句解析及易错点总结，构建逻辑清晰的知识网络。 其亮点在于采用“概念梳理-分类例证-靶向突破”复习策略，如通过修饰人/事物的形容词对比表培养思维品质，设计单选、句子改写等分层练习提升语言能力，助力学生精准掌握用法差异，教师可依托资料实施个性化复习，有效巩固语法知识。

It is/was + adj. + (for / of sb.) + to do sth. It is/was + adj. + that 从句 It 形式主语其他句型 Unit 2 - Grammar it做形式主语的用法详解 在英语中,当主语部分过长(如不定式、动名词、从句等)时,为了避免句子头重脚轻、保持句式平衡,会用it 充当“形式主语”,而把真正的主语放在句子末尾。 it本身无实际含义,只起指代和平衡句式的作用。 用 法 分 类 It 句型 It + is/was + adj. + to do sth. 做某事是怎么样的 It + is/was + adj. + for sb. + to do sth. It + is/was + adj. + of sb. + to do sth. It + is/was + ... + that 从句 ......是......的 对某人来说,做某事是怎么样的 It + is / was + n. (短语) + that 从句 It + is / was + done + that 从句 It + is / was + adj. + that 从句 It + vi. + that 从句 It + is/was + adj. + to do sth. 做某事是怎么样的 Point 其中It为形式主语,真正的主语是动词不定式(短语)。 It's important to prevent teenagers from being bullied. 该结构中,在to do sth前加上 for/of sb, sb是动词不定式(短语)的逻辑主语。 It + is/was + adj. + for sb. + to do sth. It + is/was + adj. + of sb. + to do sth. adj 修 饰 事 物 / 动 作用 for adj 修 饰 描述人 ( 品格 / 性格 / 品德 ) 用 of 修 饰 事 物 / 动 作常用的adj: important (重要的) /necessary (必要的) / difficult/ hard(困难的)/easy(容易的)/possible(可能的)/ impossible(不可能的)/useful(有用的)dangerous(危险的)/interesting(有趣的)/ boring(无聊的) It is necessary for us to keep quiet in the library. It was difficult for him to finish the work alone. It is useful for students to take notes in class. 修 饰 人常用的adj: kind (善良的) /nice(友好的)/polite(礼貌的)/ rude(粗鲁的)/ clever/ smart(聪明的)/foolish/silly(愚蠢的)/brave(勇敢的)/careful(细心的)/ careless(粗心的)/selfish(自私的)/generous(慷慨的) It is kind of you to help me with my English. It is brave of the little boy to save the cat. It was careless of him to make so many mistakes. It + is/was + ... + that 从句 ......是......的 Point 1. It + is / was + adj. + that 从句 该结构中: it是形式主语,真正主语是后面的that从句,负责传递具体的信息、事实或观点; 句中的形容词是核心修饰成分,主要用于表达说话人对that从句所描述内容的“观点、态度、判断或感受”,也是这类句式与其他形式主语用法的核心区别。 易错点解析: ① that从句的引导词:that不可省略, 即使从句语义完整, 也必须保留that如不能说“It is clear he is lying”,需说“It is clear that he is lying”. ② 虚拟语气的使用: 仅当形容词是“表建议、要求”类(如 advisable, desirable)时,that从句才用虚拟语气; 其他类形容词后的that从句用陈述语气,时态根据实际语境调整; 与“it + is/was + adj. + to do sth.”的区别: 两者核心都是it作形式主语,区别在于真正主语——前者是that从句(表达完整的事实/观点),后者是不定式(表达具体的动作),不可混淆。 真正主语是that从句,形容词多为表示观点、态度的词,如true, clear, obvious, certain, strange, surprising等。 It is clear that he is lying. 很明显,他在撒谎。 It is strange that she didn’t come to the party. 她没来参加派对,真是奇怪。 It + is/was + ... + that 从句 ......是......的 Point 2. It + is / was + n. (短语) + that 从句 该结构用于表达“......是一件......的事”。that从句作为真正的主语对前面的名词(短语)进行解释说明。 常见名词短语有 a pity, a fact, a shame, good news,no wonder等。 It is a pity that you missed the concert.很遗憾你错过了那场音乐会。 It is no wonder that he is so tired-heworked all night. 难怪他这么累,他工作了一整晚。 It + is/was + ... + that 从句 ......是......的 Point 3. It + is / was + done + that 从句 该结构用于表达“据说/据报道/据认为......”,be动词后接过去分词,整体多用于被动语态.这类结构常用来转述信息,无需明确动作的执行者(即“谁据说、谁报道”),使表达更客观、更简洁。 常见的过去分词有said, reported, believed, known, suggested oIt is said that he has won first prize.据说他获得了一等奖。 It was reported that the accident happened atmidnight.据报道,事故发生在午夜。 常见的过去分词可分为三类: ① 表达传闻:said(据说),reported(据报道),rumored(据传闻); ② 表达认知:believed(人们相信),known(众所周知),thought(人 们认为); ③ 表达验证:found(人们发现),proved(事实证明),shown(研究 表明)。 需要注意的是,that从句中的时态需根据实际语境调整,不可随意混用。 It is said that he has gone to Beijing. 据说他已经去北京了。 It is reported that the project will be completed next month. 据报道,这个项目将于下个月完工。 It + v. + that 从句 Point 该句型中,it作形式主语,指代后面的that从句(部分可替换为whether/if从句) 句中的不及物动词是句子的谓语,核心作用是表达“偶然发生、似乎出现、重要与否”等含义,多用于口语和书面语的日常表达。 常见的不及物动词可分为三类: ① 表达偶然:happen(碰巧),occur(发生、想到); ② 表达推测:seem(似乎、好像),appear(看起来、似乎); ③ 表达重要性:matter(重要),count(要紧)。 It happened that I met my old friend on the street yesterday. 昨天我碰巧在街上遇到了我的老朋友。 It doesn’t matter whether you come early or late. 你来得早或晚都没关系。 总结:易错点与考点 Point 易错点1:形式主语只能用it,不能用this/that 错误:This is important for me to study hard. 正确:It is important for me to study hard. 易错点2:to后面必须跟动词原形,不能加ing 错误:It is kind of you helping me. 正确:It is kind of you to help me. 易错点3:of/for不可混用,严格按照人品/事物判断 At the meeting, the managers kept arguingabout the problemthey reached an agreement. A.after C.until B.when D. since 一. 单项选择 1. is our duty to make our country better and stronger. A. It B. This C. That D. One 2. It's important for people a peaceful world. A. have B. had C.to have D.to be having 3. It's necessary teenagers how to spend their pocket money wisely. A. for; learn B. of; learn C. for; to learn D. of; to learn A C C At the meeting, the managers kept arguingabout the problemthey reached an agreement. A.after C.until B.when D. since 4. is important us to master a new technology. A. It; of B. It; for C. That; of D. That; for 5. It's true I don't have any income now and no one knows what will happen next. A. that B.what C. which D.when 6. is necessary to wear a helmet when we are riding a bicycle to ensure our safety. A. It B. This C. That D. Which B A A At the meeting, the managers kept arguingabout the problemthey reached an agreement. A.after C.until B.when D. since 7. It's important for the disabled the ability to make a living. A. have B. to have C. having D. has 8. It's very kind you to lend me your reusable shopping bags. A.of B. for C.to D. with 二. 根据汉语意思完成句子 1. 第一,均衡饮食很重要。 First, to have a balanced diet. 2. 人们认为,茶在六至七世纪传到了朝鲜和日本。 that tea was brought to Korea and Japan during the 6th and 7thcenturies. B A it's important It's believed At the meeting, the managers kept arguingabout the problemthey reached an agreement. A.after C.until B.when D. since 3.你认为与同学友好相处容易吗? Do you think your classmates? 4.五月下雪,这很令人惊讶。 it snows in May. 5. 似乎她知道这个秘密。 It she knows the secret. 6.对于中国孩子来说,在校期间学一门第二语言是非常重要的。(be) For Chinese children, a second language in school. It's surprising that seems that it is very important to learn it's easy to get on well with At the meeting, the managers kept arguingabout the problemthey reached an agreement. A.after C.until B.when D. since 7. 对学生们来说,学习不同国家的文化是很有趣的。 students to learn about different cultures from different countries. 8. You are brave to save the child from the fire. ( 改写句子) It's the child from the fire. B It is interesting for brave of you to save Thanks ! $