预习14 Unit 4 The Earth 重点语法讲解与练习 【暑假预习】2026-2027学年沪教版七年级英语上册（广州卷）

**基本信息** 暑假预习沪教版七年级英语上册Unit 4语法专项，涵盖可数/不可数名词、There be句型等核心语法，配套单选、填空、句型转换练习，讲练结合强化预习效果。 **题型特征** |题型|题量/分值|知识覆盖|命题特色| |----|-----------|----------|----------| |单项选择题|20题|There be句型（第1题）、must/mustn’t（第2题）、可数名词复数（第3题）|结合环保主题（如“protect our home—the Earth”），考查语法在真实情境中的应用，提升语言能力| |用所给词适当形式填空|20题|名词复数（boxes）、There be时态（is）、情态动词后动词原形（protect）|聚焦语法规则细节，强化基础巩固，培养精准语言表达能力| |句型转换|10题|There be否定/疑问（第1、2题）、must句型转换（第3、4题）|通过句式变换训练逻辑思维，提升语法综合应用能力，适配初中英语核心素养要求|

【暑假预习】2026-2027学年沪教版七年级英语上册（广州卷） 预习14 Unit 4 The Earth 重点语法讲解与练习 重点语法讲解 语法一：可数名词 & 不可数名词 1. 可数名词：有单复数，可加a/an、many、数字 复数规则：一般+s；s/x/ch/sh/o+es；辅音+y变i+es；f/fe→ves 例：tree-trees; box-boxes; city-cities; knife-knives 2. 不可数名词（本单元高频）：water, air, land, plastic, rubbish, wood 无复数，不能加a/an；搭配much/a little/lots of 量化表达：a piece of plastic 一块塑料；two bottles of water 两瓶水 3. some/any some用于肯定句；any用于否定、疑问句，后可接可数复数/不可数名词 语法二：There be 句型（必考） 1. 结构：There is + 单数/不可数；There are + 复数名词 2. 时态：一般现在时描述地球现有事物 3. 否定：There isn’t / There aren’t 4. 疑问：Is there…? / Are there…? 5. 就近原则：be动词由靠近它的名词单复数决定 There is some water and two trees. 语法三：情态动词 must / mustn’t 1. must 必须（责任、环保规则） You must save water. 2. mustn’t = must not 禁止，不准 We mustn’t throw rubbish everywhere. 3. 一般疑问句：Must you…? 肯定回答：Yes, …must. 否定回答：No, …needn’t / don’t have to. 语法四：量词短语 a lot of / lots of / many / much many + 可数复数；much + 不可数；a lot of = lots of 两者都可 语法专练 一、单项选择题 1. There ____ much clean water on the Earth now. A. is B. are C. am 2. We ____ protect our home—the Earth. A. mustn’t B. must C. don’t 3. There are many ____ on the hill. A. tree B. trees C. a tree 4. There isn’t ____ plastic on the desk. A. some B. any C. many 5. You ____ pick flowers in the park. It’s wrong. A. must B. mustn’t C. can 6. How many ____ are there in the box? A. bottle of water B. bottles of water C. bottle of waters 7. There ____ a river and three parks near my home. A. is B. are C. have 8. ____ there any clean air in the city? A. Is B. Are C. Do 9. We have ____ rubbish every day. It’s bad for the Earth. A. many B. much C. a lot 10. —Must I clean the room now? —No, you ____. A. must B. mustn’t C. needn’t 11. Look! Those ____ are cutting down trees. A. man B. men C. mans 12. There ____ lots of animals in the forest long ago. A. is B. are C. were 13. I have ____ books about the Earth. A. much B. many C. a little 14. You ____ save every drop of water. A. must B. mustn’t C. aren’t 15. There is ____ piece of wood on the ground. A. a B. an C. two 16. There aren’t ____ birds in the tree now. A. some B. any C. a 17. Too ____ plastic pollutes the sea. A. many B. much C. little 18. How ____ forests can you see in the picture? A. much B. many C. long 19. We ____ leave rubbish in the river. A. mustn’t B. must C. can 20. A lot of ____ lives on the land. A. animal B. animals C. an animal 二、用所给词适当形式填空 1. There ________ (be) some clean water in the cup. 2. There are five ________ (box) on the desk. 3. We must ________ (protect) the Earth. 4. There ________ (not be) any plastic here. 5. Many ________ (animal) live in the forest. 6. Two ________ (bottle) of milk are on the table. 7. You mustn’t ________ (throw) rubbish everywhere. 8. There ________ (be) a tree and two flowers in the garden. 9. There ________ (be not) many fish in the dirty river. 10. Look at those ________ (knife). They are sharp. 11. How many ________ (city) are there in our country? 12. There ________ (be) lots of clean air in the countryside. 13. A little ________ (water) is in the glass. 14. Must I ________ (finish) the work today? 15. There ________ (be) three parks near our school. 16. People cut down many ________ (tree) every year. 17. There isn’t any ________ (rubbish) on the ground now. 18. These ________ (man) work hard to protect the sea. 19. We have a lot of ________ (book) about the Earth. 20. There ________ (be not) any birds in the cage. 三、句型转换（There be / must / some any转换） 1. There is some clean water in the lake.（改为否定句） ___________________________________________________________________ 2. There are many trees in the forest.（改为一般疑问句） ___________________________________________________________________ 3. We must save water every day.（改为一般疑问句） ___________________________________________________________________ 4. You mustn’t pick flowers in the park.（改为肯定句） ___________________________________________________________________ 5. There is a piece of plastic on the ground.（对划线部分提问） ___________________________________________________________________ 6. There are three rivers in the picture.（对划线部分提问）  ___________________________________________________________________ 7. We can see some birds in the tree.（改为否定句） ___________________________________________________________________ 8. You must clean your room every day.（对划线部分提问） ___________________________________________________________________ 9. There is some air in the box.（改为复数句） ___________________________________________________________________   10. We must protect the Earth.（改为否定句） ___________________________________________________________________ 参考答案 一、 1.A 2.B 3.B 4.B 5.B 6.B 7.A 8.A 9.B 10.C 11.B 12.C 13.B 14.A 15.A 16.B 17.B 18.B 19.A 20.B 二、 1. is 2. boxes 3. protect 4. isn’t 5. animals 6. bottles 7. throw 8. is 9. aren’t 10. knives 11. cities 12. is 13. water 14. finish 15. are 16. trees 17. rubbish 18. men 19. books 20. aren’t 三、 1. There isn’t any clean water in the lake. 2. Are there many trees in the forest? 3. Must you save water every day? 4. You can pick flowers in the park. 5. What is on the ground? 6. How many rivers are there in the picture? 7. We can’t see any birds in the tree. 8. What must you do every day? 9. There is some air in the boxes. 10. We mustn’t protect the Earth. 学科网（北京）股份有限公司 $