Unit 2 Different families（易错题专项训练・语法提升）英语人教PEP版三年级上册（新教材）

Unit2 Different families 专题02 语法提升·易错题专项训练 · 内容导航 · 1. This is / These are 单复数 be 动词语法变换 2. Is this… 陈述句↔一般疑问句转换 3. he/she 人称代词同义替换 4. I have 肯定 / 否定句型变形 5. 形容词同义句式改写 6. 单句改错三类典型错误梳理 7. 句型缩写 & 完整形式改写 8.综合训练 高频易错点、易错点提示、小练笔、答题点拨 易错精讲 This is / These are 单复数 be 动词变换高频易错点01 “This is”和“These are”都用来介绍人或事物，核心区别在单复数，搭配的be动词完全不同。 1. This is 单数介绍 this 指代“单个”人/物品，后面搭配be动词is。 句型：This is + 单数人物名词 例：This is my grandpa. 这是我的爷爷。 This is my sister. 这是我的妹妹。 2. These are 复数介绍 these 指代“两个及以上”多个人/物品，后面搭配be动词are。 句型：These are + 复数人物名词 例：These are my cousins. 这些是我的堂兄弟姐妹。 These are my mum and dad. 这是我的爸爸妈妈。 易错点提示 单数介绍：This + is 复数介绍：These + are 小练笔 01 单项选择 ( )1. This ______ my brother. A. is B. are ( )2. These ______ my two cousins. A. is B. are ( )3. This ______ my grandma. A. is B. are ( )4. These ______ my aunt and uncle. A. is B. are ( )5. This ______ my baby sister. A. is B. are 陈述句↔一般疑问句转换高频易错点02 本单元介绍类句子可在陈述句、一般疑问句之间互换，核心变化是调换主语和be动词位置。 1. 陈述句结构：This is + 人物. 含义：这是…… 例：This is my uncle. 这是我的叔叔。 2. 一般疑问句结构：Is this + 人物? 含义：这是……吗？ 例：Is this my uncle? 这是我的叔叔吗？ 3. 否定句变化：在be动词后加not，可缩写isn’t 陈述句否定：This isn’t my sister. 这不是我的妹妹。 4. 固定问答搭配 问句：Is this your ...? 肯定答：Yes, it is. 否定答：No, it isn’t. 易错点提示 陈述句变问句：把Is提到句首 否定直接在is后加not，缩写isn’t 小练笔 02 单项选择 ( )6. ______ this your grandpa? A. Is B. Are ( )7. This ______ my aunt.（否定形式） A. isn’t B. is ( )8. —Is this your cousin? —No, it ______. A. is B. isn’t ( )9. This is my uncle.（变问句）______ this your uncle? A. Is B. Are ( )10. It ______ my brother.（肯定） A. is B. isn’t he/she 人称代词句型同义替换高频易错点03 he、she 用来替代前文提到的家人，区分人物性别，不可混用。 1. he 用于男性人物（爸爸、爷爷、叔叔、弟弟、堂兄等） 前文：This is my father. 替换句：He is my father. 例：This is my uncle. He is nice. 2. she 用于女性人物（妈妈、奶奶、阿姨、妹妹、堂姐等） 前文：This is my mother. 替换句：She is my mother. 例：This is my aunt. She helps me. 3. 问答固定代词 问句 Is this your ...? 回答统一用it，不用he/she。 男性人物用he，女性人物用she易错点提示 一般疑问句答句固定用it 小练笔 03 选词填空 he she it 11. This is dad. ______ is tall. 12. This is mum. ______ is nice. 13. —Is this sister? —Yes, ______ is. 14. My uncle: ______ loves me. 15. My aunt: ______ helps me. I have 肯定、否定语法变形 高频易错点04 have 表示“拥有”，本单元只学习主语I搭配have，第三人称has暂不涉及。 1. 肯定句型：I have + 家人/物品 含义：我有…… 例：I have a big family. 我有一个大家庭。 I have two cousins. 我有两个堂兄妹。 2. 否定句型：I don’t have + 家人/物品 含义：我没有…… 例：I don’t have a baby sister. 我没有小妹妹。 3. 语法规则：I后面永远用动词原形have，不能用has。 易错点提示 主语I 后面固定用have 否定在have前加don’t 小练笔 04 单项选择 ( )16. I ______ a small family. A. have B. has ( )17. I don’t ______ a baby sister. A. have B. has ( )18. I ______ two cousins. A. have B. has ( )19. I don’t ______ a big family. A. have B. has ( )20.He ______ a small family. A.have B. has 形容词同义句式改写高频易错点05 描述家庭大小有两种可互换句型，核心词汇big（大的）、small（小的）。 1. 句型1：物作主语 My family + is + big/small 例：My family is big. 我的家庭很大。 My family is small. 我的家庭很小。 2. 句型2：人作主语 I have + a + big/small family 例：I have a big family. 我有一个大家庭。 3. 关键语法点：family是单数名词，搭配be动词is；单数可数名词前必须加a。 易错点提示 family单数搭配is 两种同义句可互相转换 小练笔 05 单项选择 ( )21. My family ______ small. A. is B. are ( )22. I have ______ big family. A. a B. \ ( )23. This family ______ not small. A. is B. are ( )24. I ______ a small family. A. have B. am ( )25. My family is big = I ______ a big family. A. have B. is 单句改错三类典型错误梳理 高频易错点06 本单元高频语法错误共三类，对应be动词、人称代词、物主代词知识点： 1. 缺少be动词is 错误：This my grandpa. 正确：This is my grandpa. 规则：this后必须搭配is，不能直接接名词。 2. he/she 性别混用 错误：This is my aunt. He is kind. 正确：This is my aunt. She is kind. 规则：女性人物只用she，男性只用he。 3. 缺少物主代词my 错误：I have big family. / This uncle. 正确：I have a big family. / This is my uncle. 规则：介绍家人前一般加my，单数名词前加a。 易错点提示 this后必须加is 男he女she不能混用 家人名词前加my，单数名词加a 小练笔 06 划出错误并改正 26. This my grandpa. 27. This is my aunt. He is kind. 28. This uncle. 29. This is my brother. She tall. 30. I have big family. 句型缩写 & 完整形式改写高频易错点07 本单元两组常用缩写，同时可切换人称代词改写句子。 1. This is = This’s 完整句：This is my dad. 缩写句：This’s my dad. 2. is not = isn’t 完整否定：This is not my cousin. 缩写否定：This isn’t my cousin. 3. 人称改写转换 This is my father. → He is my father. 易错点提示 is可和前面单词缩写，否定is not缩写isn’t 小练笔 07 按句型要求填空改写 31. This is my sister.（缩写）______ my sister. 32. This is my father.（换人称 he）______ my father. 33. My family is small.（换 I have）I ______ a small family. 34. Is this your grandma?（改为陈述句）This ______ your grandma. 35. This is not my cousin.（缩写否定）This ______ my cousin. 综合训练 一、选词填空 is are have he she 1. This ______ my aunt. 2. These ______ my cousins. 3. I ______ a small family. 4. This is dad. ______ likes me. 5. This is mum. ______ helps me. 6. I don’t ______ a baby sister. 二、单项选择 ( )1. ______ this your brother? A. Is B. Are ( )2. I ______ a big family. A. have B. has ( )3. This ______ my uncle, not my dad. A. isn’t B. is ( )4. —Is this your sister? —Yes, ______. A. it is B. she is 三、句型转换 1. This is my grandma.（改为一般疑问句） 2. This is my brother.（改为否定句） 3. I have a small family.（同义句） 4. These are my cousins.（改为单数句） 5. Is this your aunt?（改为陈述句） 6. This is my grandpa.（缩写 This is） 四、短文语法填空 Look! This ______(1) my family. This ______(2) my dad. ______(3) is tall. This ______(4) my mum. ______(5) is nice. I ______(6) a small family. We ______(7) love each other. 五、单句改错 1. This my baby sister. 2. This is my uncle. She is kind. 3. I have big family. 4. These is my two brothers. 5. Is this you grandma? 6. This isn’t aunt. 六、句式改写 1. This is my sister.（用人称 she 改写句子） 2. My family is big.（改写为 I have 句型） 3. This is not my cousin.（缩写is not） 4. Is this your grandpa?（写出否定回答） 七、连词成句 1. is / This / grandma / my 2. have / I / a / small / family 3. Is / this / your / uncle 参考答案 小练笔 01 1.A 2.B 3.A 4.B 5.A 小练笔 02 6.A 7.A 8.B 9.A 10.A 小练笔 03 11.He 12.She 13.it 14.He 15.She 小练笔 04 16.A 17.A 18.A 19.A 20.A 小练笔 05 21.A 22.A 23.A 24.A 25.A 小练笔 06 26. 错误：This → 改正：This is 【解析】this 后缺少系动词 is。 27. 错误：He → 改正：She 【解析】aunt 是女性，人称代词混用。 28. 错误：This → 改正：This is my 【解析】缺少be动词和物主代词my。 29. 错误：She tall → 改正：She is tall 【解析】形容词前必须加be动词is。 30. 错误：big family → 改正：a big family 【解析】单数可数名词前缺少不定冠词a。 小练笔 07 31.This’s 32.He’s 33.have 34.is 35.isn’t 综合训练 一、选词填空 1.is 2.are 3.have 4.He 5.She 6.have 二、单项选择 1.A 2.A 3A 4.A 三、句型转换答案 1. Is this your grandma? 2. This isn’t my brother. 3. My family is small. 4. This is my cousin. 5. This is your aunt. 6. This’s my grandpa. 四、短文语法填空 1. is 2.is 3.He 4.is 5.She 6.have 7.all 五、单句改错 1. This → This is 2. She → He 3. big family → a big family 4. is → are 5. you → your 6. aunt → your aunt 六、句式改写 1. She is my sister. 2. I have a big family. 3. This isn’t my cousin. 4. No, it isn’t. 七、连词成句 1. This is my grandma. 2. I have a small family. 3. Is this your uncle? 第 12 页 共 13 页 学科网（北京）股份有限公司 学科网（北京）股份有限公司 $