Unit2语法专项课件 可数与不可数名词+It is + adj. + (for sb.) + to do sth. 2025-2026学年北师大版七年级英语下册

教学课件 北师大英语七年级下册 Unit2 语法专项——可数与不可数名词+It is + adj. + (for sb.) + to do sth.核心句型 全解精讲+分层练习 1 学习目标 区分可数与不可数名词，掌握二者核心用法 熟记可数名词复数的规则与不规则变化形式 正确搭配量词、修饰词与两类名词使用 掌握It is + adj. + (for sb.) + to do sth.核心句型 运用语法知识完成多种题型的应用练习 可数&不可数名词 定义 可数名词可直接用数字计数，有单、复数两种形式 不可数名词无法直接计数，无复数形式，也不能直接加a/an 可数名词可搭配数词直接表数量，不可数名词则无此用法 常见可数名词：a student、two apples；常见不可数名词：rice、milk 可数名词复数 规则变化 1.一般情况下，可数名词直接在词尾加-s， 2.以s、x、ch、sh结尾的单词加-es 清辅音后-s读/s/，浊辅音、元音后读/z/，-es多读作/ɪz/ 典型变形示例：book→books，bus→buses，watch→watches 可数名词复数 规则变化 3.以辅音字母+y结尾的单词，变y为i再加-es；元音字母+y结尾直接加-s 变y为i的情况读音多为/ɪz/，直接加s的情况多读作/z/ 示例：city→cities，boy→boys，family→families 4.以o结尾的单词按有生命、无生命划分变化规则，有生命加-es，无生命加-s。 示例：tomato→tomatoes,potato→potatoes,photo→photos,piano→pianos 可数名词复数 不规则变化 这类变化无固定规律，无统一变形规则，需要单独特殊记忆 部分单词存在单复同形的情况，也有部分单词会完全变形 常见变形示例：sheep→sheep，man→men，child→children，foot→feet 不可数名词 核心用法1 不可数名词作句子主语时，谓语动词只能使用单数形式 该规则不受some、a little等修饰词的修饰影响，为固定用法 不可数名词后绝对不能加-s表复数，是高频易错点 用法示例：Milk is good for us. Bread tastes delicious. 不可数名词 核心用法2 不可数名词表具体数量时，必须借助“量词+of”的固定结构 a cup of、a glass of、a piece of是最基础也最常用的量词 表达多个数量时，只需将量词变为复数，不可数名词保持原形 用法示例：two pieces of bread，three glasses of juice，a cup of tea 两类名词 修饰词专项辨析 修饰词需严格匹配名词类型，可数与不可数名词的修饰词不可交叉使用 可数名词复数专用修饰词：many、a few、how many 不可数名词专用修饰词：much、a little、how much 搭配示例：many apples，a few pens；much water，a little milk 修饰词 易混点拓展 a few和few仅修饰可数名词，a little和little仅修饰不可数名词 带a的a few、a little表肯定含义，指“有一点，少量” 不带a的few、little表否定含义，指“几乎没有” 可借助口诀记忆：有a就有，无a就无；few接可数，little接不可数 搭配示例：a few eggs，few books；a little juice，little rice 核心句型 It is + adj. + to do sth. 结构 核心完整句型为It is (not) + 形容词 + (for sb.) + to do sth. It为形式主语，无实际意义，仅用于平衡句子结构 to do sth.是真正的主语，表达句子实际要说明的内容 for sb.为可选成分，可根据句意灵活省略 核心句型 成分与含义解读 句型中的形容词，用于描述后面to do sth.这个行为的性质或特征 加for sb.时，句型含义为“对某人来说，做某事是……的” 不加for sb.时，直接表“做某事是……的”，适用于普遍情况 常用形容词多为描述行为属性的词汇，如important、good、helpful 核心句型 肯定句用法 核心句型的肯定形式直接使用It is + 形容词 + (for sb.) + to do sth. 可根据表达需要，决定是否添加for sb.表动作的对象 用法示例： It is important to eat healthy food. It is necessary for us to finish homework on time. 核心句型 否定句用法 在句型的be动词后直接加not，即可构成核心句型的否定形式 否定含义直接修饰后面的形容词，表“做某事是不……的” 用法示例： It is not good to eat too much junk food. It is not easy to learn English well. 句型转换 不定式变主语 To do sth.作主语的句子，可与本单元核心句型互相转换 二者句意完全一致，仅句子结构不同，核心句型在使用中更普遍 转换示例： To learn English well is important. → It is important to learn English well. 语法小练 单选 1.I have three ______ and a glass of juice for breakfast. A. orange B. oranges C. orangees 2.There ______ some bread on the plate. A. is B. are C. am 3.It is helpful ______ sports every day. A. play B. to play C. playing 4.—Would you like some ______? —I’m hungry. A. tea B. fish C. water 5.How ______ rice do you need for dinner? A. many B. much C. some B A B B B 6.It is not healthy ______ too much sweet food. A. eat B. to eat C. eats 7.I can see five ______ in the kitchen. A. potato B. potatos C. potatoes 8.______ is good for our eyes. A. To read books B. Read books C. Reads books 9.We need to buy some ______ for the trip. A. cake B. cakes C. a cake 10.It is easy ______ English words if you read more. A. remember B. to remember C. remembers B C A B B 语法小练 用所给词适当形式填空 1.I have two ____________ (sandwich) for lunch. 2.There __________ (be) some water in the bottle. 3.It is important ___________ (wash) hands before meals. 4.How many _____________ (strawberry) do you have? 5.My mother likes drinking ___________ (tea) very much. sandwiches is to wash strawberries tea 语法小练 用所给词适当形式填空 6.It is not good ___________ (stay) up late every night. 7.There are four ___________ (tomato) in the fridge. 8.It is helpful ___________ (read) English every morning. 9.We should eat more ___________ (fruit) and vegetables. 10.How much ___________ (meat) do you want to buy? to stay tomatoes to read fruit meat 语法小练 句型转换 1.I like bananas.（改为否定句） 2.She has an egg for breakfast.（改为一般疑问句） 3.There is some juice in the glass.（改为否定句） 4.We need four tomatoes.（对划线部分four提问） 5.It is good to do exercise every day.（用for us改写句子） I don't like bananas. Does she have an egg for breakfast? There isn't any juice in the glass. How many tomatoes do you need? It is good for us to do exercise every day. 6.I have some bread.（对划线部分some bread提问） 7.To get up early is good for health.（改为同义句） 8.He likes noodles best.（对划线部分noodles提问） 9.There are three cups of coffee on the table.（对划线部分three提问） 10.It is bad to eat too much ice cream.（改为同义句） What do you have? It is good for health to get up early. What does he like best? How many cups of coffee are there on the table? To eat too much ice cream is bad. 语法小练 汉译英 1.对我们来说，每天锻炼很有益。 2.碗里有一些牛肉。 3.吃太多汉堡是不健康的。 4.我想要两杯牛奶和一个三明治。 5.记住英语单词对学生来说很重要。 It is helpful for us to exercise every day. There is some beef in the bowl. It is unhealthy to eat too many hamburgers. I'd like two glasses of milk and a sandwich. It is important for students to remember English words. 高频易错点 不可数名词误加-s变复数，如错误写waters，正确为water 量词变复数时，误将不可数名词也变复数，如错误写two breads 修饰词交叉使用，如错误写much apples，正确为many apples 核心句型中遗漏to，如错误写It is important eat，正确为It is important to eat o结尾单词盲加-es，如错误写photoes，正确为photos 不规则复数记错，如错误写childs，正确为children 单元语法 核心梳理 可数名词看数量，有单复，复数变形分规则与不规则 不可数名词无复数，表数量用量词，作主语谓用单 修饰词分两类，many接可数，much接不可数，有a表肯定 核心句型记结构，It形主，to do真主，for sb.可省略 教学课件 Unit2 语法专项——可数与不可数名词+It is + adj. + (for sb.) + to do sth.核心句型 Thank you for listening! 25 $