Unit 4 Environmental Protection 情态动词、被动语态与目的状语从句（核心语法精练）英语新教材北师大版九年级下册

Unit 4 Environmental Protection 核心语法精练 （情态动词、被动语态与目的状语从句） 目录 一、知识回顾 1 二、考点夯基 2 一、用所给单词的正确形式填空 2 二、单项选择 2 三、完成句子 4 四、句型转换 5 三、综合提升 6 一、语法填空 6 二、语法选择 7 情态动词、被动语态与目的状语从句用法速览 类别 核心规则 例句与提醒 情态动词 should / shouldn't 表建议；must 表主观必须；have to 表客观需要； don't have to 表“不必” 例：We should protect the earth. mustn't 与不必 mustn't ＝ 禁止，语气强；don't have to ＝ 不必 例：You mustn't waste water. 例：You don't have to come. 一般现在时被动 am / is / are + 过去分词，表示经常性或客观事实 例：Rubbish is sorted every day. 一般过去时被动 was / were + 过去分词，表示过去发生的被动动作 例：Many green activities were held last year. 目的状语从句 so that + 从句，表示“以便、为了”，从句中常含 can / could / may 例：We sort rubbish so that less pollution is produced. 常见错误 ① × should protects → should protect ② × is sort → is sorted ③ so that 后接句子，不接名词 情态动词后永远跟动词原形 一、用所给单词的正确形式填空。 1.We should ________ (save) energy to protect our earth. 【答案】save 【解析】考查情态动词用法，should后接动词原形，为单元基础核心考点。 2.Lots of rubbish ________ (collect) every day to keep the city clean. 【答案】is collected 【解析】考查一般现在时被动语态，rubbish与collect为被动关系，不可数名词搭配is+V-ed。 3.People must ________ (stop) cutting down trees randomly. 【答案】stop 【解析】考查情态动词must用法，must后接动词原形，表保护环境的主观义务。 4.We study environmental knowledge ________ ________ we can protect nature better.（so that） 【答案】so that 【解析】考查so that目的状语从句，引导学习环保知识的行动目的，贴合单元语法。 5.Many young trees ________ (water) by students yesterday afternoon. 【答案】were watered 【解析】考查一般过去时被动语态，trees为复数，过去时被动用were+V-ed。 6.We have to ________ (follow) environmental rules in public places. 【答案】follow 【解析】考查have to情态结构，have to后接动词原形，表客观必须遵守的规则。 二、单项选择。 1．We ________ throw litter everywhere. It’s bad for the environment. A．shouldn’t B. should C. must D. have to 【答案】A 【解析】考查情态动词否定用法，shouldn’t表“不应该”，用于环保行为建议禁止。 2．The old park ________ by volunteers every month. A．cleans B. cleaned C. is cleaned D. was cleaned 【答案】C 【解析】考查一般现在时被动语态，every month表常态，park与clean被动关系。 3．We take reusable bags ________ we can reduce plastic pollution. A．so B. so that C. because D. although 【答案】B 【解析】考查目的状语从句，so that引导行为目的，贴合环保场景。 4．Everyone ________ protect wild animals. It’s our duty. A．should B. shouldn’t C. don’t have to D. can’t 【答案】A 【解析】考查情态动词should表责任建议，人人都应该保护野生动物。 5．Many flowers ________ in our school garden last spring. A．plant B. planted C. are planted D. were planted 【答案】D 【解析】考查一般过去时被动语态，last spring为过去时间，flowers为复数。 6．You ________ waste water. Water is a precious resource. A．mustn’t B. must C. have to D. should 【答案】A 【解析】考查mustn’t表禁止，绝对不可以浪费水资源，语气强烈。 7．We learn to sort rubbish ________ we can keep our community clean. A．so that B. so C. but D. or 【答案】A 【解析】考查so that目的状语从句，说明垃圾分类的目的。 8．Students ________ wear school uniforms for the environmental activity. The school rule requires it. A．must B. have to C. should D. can 【答案】B 【解析】考查have to表客观不得不，因校规规定必须穿校服，区别于主观must。 9．The polluted river ________ cleaned up last week. A．is B. was C. are D. were 【答案】B 【解析】考查一般过去时被动，last week表过去，river单数用was。 10．We ________ save paper to protect forests. A．should B. shouldn’t C. mustn’t D. can’t 【答案】A 【解析】考查should表环保建议，节约用纸保护森林是每个人的责任。 11．People ________ cut down too many trees, or the earth will be damaged. A．mustn’t B. must C. have to D. should 【答案】A 【解析】考查mustn’t表绝对禁止，严禁乱砍滥伐树木。 12．We walk to school every day ________ we can reduce air pollution. A．because B. although C. so that D. so 【答案】C 【解析】考查so that引导目的状语从句，步行上学是为了减少空气污染。 三、完成句子。 1．我们应该低碳出行来保护环境。 We ________ take low‑carbon trips to protect the environment. 【答案】should 【解析】考查情态动词should表环保建议，后接动词原形。 2．每天有大量垃圾被回收利用。 Lots of waste ________ ________ every day. 【答案】is recycled 【解析】考查一般现在时被动语态，waste不可数，搭配is+过去分词recycled。 3．我们节约资源是为了保护地球家园。 We save resources ________ ________ we can protect our earth home. 【答案】so that 【解析】考查so that目的状语从句，引导动作目的。 4．我们禁止向河里倾倒污水。 We ________ pour waste water into the river. 【答案】mustn’t 【解析】考查mustn’t表绝对禁止，贴合环保规范场景。 5．去年这片荒地被改造成了小公园。 This wasteland ________ ________ into a small park last year. 【答案】was changed 【解析】考查一般过去时被动语态，单数主语搭配was+过去分词。 6．为了保持空气清新，我们不得不减少废气排放。 We ________ ________ reduce waste gas emission to keep the air fresh. 【答案】have to 【解析】考查have to表客观不得不，贴合环保客观需求。 7．我们多种树，以便改善生态环境。 We plant more trees ________ ________ we can improve the ecological environment. 【答案】so that 【解析】考查目的状语从句核心用法，适配单元语法考点。 8．所有人都必须遵守环保规则。 All people ________ follow the environmental protection rules. 【答案】must 【解析】考查must表主观义务、强制要求。 四、句型转换。 1．We should protect wild animals.（改为被动语态） Wild animals ________ ________ ________ by us. 【答案】should be protected 【解析】考查情态动词被动语态，结构为情态动词+be+V-ed。 2．He gets up early. He can take part in the tree‑planting activity.（用so that合并句子） He gets up early ________ ________ he can take part in the tree‑planting activity. 【答案】so that 【解析】考查so that合并目的状语从句，衔接前后动作与目的。 3．Workers cleaned the river last month.（改为被动语态） The river ________ ________ by workers last month. 【答案】was cleaned 【解析】考查一般过去时被动语态，单数主语搭配was+过去分词。 4．You have to finish the environmental report today.（改为否定句） You ________ ________ ________ finish the environmental report today. 【答案】don’t have to 【解析】考查have to否定形式，需借助助动词don’t，表“不必”。 5．We reuse plastic bottles to save resources.（改为同义句，用so that） We reuse plastic bottles ________ ________ we can save resources. 【答案】so that 【解析】考查目的状语从句同义转换，替换不定式表目的。 6．People must stop polluting the sea.（改为被动句式同义句） The sea must ________ ________ ________ by people. 【答案】stop being polluted 【解析】考查情态动词结合被动用法，表“被停止污染”，贴合环保语境。 一、语法填空（语篇词数：100 词） 阅读短文，用括号内所给单词的适当形式填空，每空一词。 We 1.____ (should) take action to protect our environment every day. First, we shouldn’t 2.____ (waste) natural resources. Water and trees 3.____ (be) precious resources for all living things. Rubbish 4.____ (sort) by most people now so that our living environment 5.____ (keep) clean and tidy. Last weekend, our class 6.____ (take) part in an environmental protection activity. Lots of litter 7.____ (pick) up by us in the park. We study environmental knowledge actively 8.____ (so that) we can know more ways to protect nature. Everyone must 9.____ (play) a role in protecting the earth. Small efforts from everyone will make a big difference to our green future. 【答案】 1.should 2.waste 3.are 4.is sorted 5.is kept 6.took 7.was picked 8.so that 9.play 【文章大意】短文倡导践行环保：节约资源、做好垃圾分类、参加环保活动、学习环保知识，并强调每个人都应尽责，人人出一份力就能带来大改变。 【解析】 1.情态动词后用动词原形，should 本身即情态动词，故填 should。 2.shouldn't 后接动词原形，故填 waste。 3.主语 Water and trees 为复数，用 are，故填 are。 4.Rubbish 与 sort 是被动关系，now 用一般现在时 is sorted，故填 is sorted。 5.so that 从句主语 our living environment 与 keep 是被动关系，用 is kept，故填 is kept。 6.句中有 Last weekend，用一般过去时 took，故填 took。 7.Lots of litter 与 pick up 是被动关系，用一般过去时 was picked，故填 was picked。 8.后接从句表目的，用 so that，故填 so that。 9.must 后接动词原形，故填 play。 二、语法选择（语篇词数：109 词） 通读短文，掌握大意，从 A、B、C、D 四个选项中选出最佳选项。 Environmental protection is very important for humans. We 1.____ protect our earth in our daily life. First, we 2.____ waste any food or water, because resources are limited. Second, rubbish 3.____ strictly every day so that less pollution 4.____. Last year, many green activities 5.____ in our school. Students planted trees and cleaned the community streets. We do small good things 6.____ we can make our home greener. We 7.____ follow environmental rules, and sometimes we 8.____ do some volunteer work for the environment. Nature is our home. It 9.____ well if every person can keep balanced. As students, we should keep low‑carbon life and call on more people to protect the environment. 1.A．should B．shouldn’t C．mustn’t D．can’t 2.A．must B．have to C．shouldn’t D．should 3.A．is sorted B．sorts C．was sorted D．sorted 4.A．is produced B．was produced C．produces D．produced 5.A．held B．are held C．were held D．hold 6.A．so B．so that C．because D．although 7.A．should B．shouldn’t C．mustn’t D．can’t 8.A．have to B．should C．mustn’t D．don’t have to 9.A．is protected B．protects C．protected D．was protected 【答案】 1.A 2.C 3.A 4.A 5.C 6.B 7.A 8.B 9.A 【文章大意】短文呼吁日常环保：节约食物和水、做好垃圾分类、参加绿色活动、遵守环保规则，并指出只有人人尽责，自然才能得到良好保护。 【解析】 1.表示“应该”保护地球，用 should，故选 A。 2.表示“不应该”浪费，用 shouldn't，故选 C。 3.主语 rubbish 与 sort 是被动关系，every day 用一般现在时 is sorted，故选 A。 4.pollution 与 produce 是被动关系，用 is produced，故选 A。 5.主语 activities 与 hold 是被动关系，Last year 用一般过去时 were held，故选 C。 6.后句表示目的“以便”，用 so that 引导目的状语从句，故选 B。 7.表示“应该”遵守规则，用 should，故选 A。 8.表示“有时需要”做志愿工作，用 have to，故选 B。 9.主语 it（自然）与 protect 是被动关系，用 is protected，故选 A。 1 / 12 学科网（北京）股份有限公司 $ Unit 4 Environmental Protection 核心语法精练 （情态动词、被动语态与目的状语从句） 目录 一、知识回顾 1 二、考点夯基 2 一、用所给单词的正确形式填空 2 二、单项选择 2 三、完成句子 3 四、句型转换 3 三、综合提升 4 一、语法填空 4 二、语法选择 4 情态动词、被动语态与目的状语从句用法速览 类别 核心规则 例句与提醒 情态动词 should / shouldn't 表建议；must 表主观必须；have to 表客观需要； don't have to 表“不必” 例：We should protect the earth. mustn't 与不必 mustn't ＝ 禁止，语气强；don't have to ＝ 不必 例：You mustn't waste water. 例：You don't have to come. 一般现在时被动 am / is / are + 过去分词，表示经常性或客观事实 例：Rubbish is sorted every day. 一般过去时被动 was / were + 过去分词，表示过去发生的被动动作 例：Many green activities were held last year. 目的状语从句 so that + 从句，表示“以便、为了”，从句中常含 can / could / may 例：We sort rubbish so that less pollution is produced. 常见错误 ① × should protects → should protect ② × is sort → is sorted ③ so that 后接句子，不接名词 情态动词后永远跟动词原形 一、用所给单词的正确形式填空。 1.We should ________ (save) energy to protect our earth. 2.Lots of rubbish ________ (collect) every day to keep the city clean. 3.People must ________ (stop) cutting down trees randomly. 4.We study environmental knowledge ________ ________ we can protect nature better.（so that） 5.Many young trees ________ (water) by students yesterday afternoon. 6.We have to ________ (follow) environmental rules in public places. 二、单项选择。 1．We ________ throw litter everywhere. It’s bad for the environment. A．shouldn’t B. should C. must D. have to 2．The old park ________ by volunteers every month. A．cleans B. cleaned C. is cleaned D. was cleaned 3．We take reusable bags ________ we can reduce plastic pollution. A．so B. so that C. because D. although 4．Everyone ________ protect wild animals. It’s our duty. A．should B. shouldn’t C. don’t have to D. can’t 5．Many flowers ________ in our school garden last spring. A．plant B. planted C. are planted D. were planted 6．You ________ waste water. Water is a precious resource. A．mustn’t B. must C. have to D. should 7．We learn to sort rubbish ________ we can keep our community clean. A．so that B. so C. but D. or 8．Students ________ wear school uniforms for the environmental activity. The school rule requires it. A．must B. have to C. should D. can 9．The polluted river ________ cleaned up last week. A．is B. was C. are D. were 10．We ________ save paper to protect forests. A．should B. shouldn’t C. mustn’t D. can’t 11．People ________ cut down too many trees, or the earth will be damaged. A．mustn’t B. must C. have to D. should 12．We walk to school every day ________ we can reduce air pollution. A．because B. although C. so that D. so 三、完成句子。 1．我们应该低碳出行来保护环境。 We ________ take low‑carbon trips to protect the environment. 2．每天有大量垃圾被回收利用。 Lots of waste ________ ________ every day. 3．我们节约资源是为了保护地球家园。 We save resources ________ ________ we can protect our earth home. 4．我们禁止向河里倾倒污水。 We ________ pour waste water into the river. 5．去年这片荒地被改造成了小公园。 This wasteland ________ ________ into a small park last year. 6．为了保持空气清新，我们不得不减少废气排放。 We ________ ________ reduce waste gas emission to keep the air fresh. 7．我们多种树，以便改善生态环境。 We plant more trees ________ ________ we can improve the ecological environment. 8．所有人都必须遵守环保规则。 All people ________ follow the environmental protection rules. 四、句型转换。 1．We should protect wild animals.（改为被动语态） Wild animals ________ ________ ________ by us. 2．He gets up early. He can take part in the tree‑planting activity.（用so that合并句子） He gets up early ________ ________ he can take part in the tree‑planting activity. 3．Workers cleaned the river last month.（改为被动语态） The river ________ ________ by workers last month. 4．You have to finish the environmental report today.（改为否定句） You ________ ________ ________ finish the environmental report today. 5．We reuse plastic bottles to save resources.（改为同义句，用so that） We reuse plastic bottles ________ ________ we can save resources. 6．People must stop polluting the sea.（改为被动句式同义句） The sea must ________ ________ ________ by people. 一、语法填空（语篇词数：100 词） 阅读短文，用括号内所给单词的适当形式填空，每空一词。 We 1.____ (should) take action to protect our environment every day. First, we shouldn’t 2.____ (waste) natural resources. Water and trees 3.____ (be) precious resources for all living things. Rubbish 4.____ (sort) by most people now so that our living environment 5.____ (keep) clean and tidy. Last weekend, our class 6.____ (take) part in an environmental protection activity. Lots of litter 7.____ (pick) up by us in the park. We study environmental knowledge actively 8.____ (so that) we can know more ways to protect nature. Everyone must 9.____ (play) a role in protecting the earth. Small efforts from everyone will make a big difference to our green future. 二、语法选择（语篇词数：109 词） 通读短文，掌握大意，从 A、B、C、D 四个选项中选出最佳选项。 Environmental protection is very important for humans. We 1.____ protect our earth in our daily life. First, we 2.____ waste any food or water, because resources are limited. Second, rubbish 3.____ strictly every day so that less pollution 4.____. Last year, many green activities 5.____ in our school. Students planted trees and cleaned the community streets. We do small good things 6.____ we can make our home greener. We 7.____ follow environmental rules, and sometimes we 8.____ do some volunteer work for the environment. Nature is our home. It 9.____ well if every person can keep balanced. As students, we should keep low‑carbon life and call on more people to protect the environment. 1.A．should B．shouldn’t C．mustn’t D．can’t 2.A．must B．have to C．shouldn’t D．should 3.A．is sorted B．sorts C．was sorted D．sorted 4.A．is produced B．was produced C．produces D．produced 5.A．held B．are held C．were held D．hold 6.A．so B．so that C．because D．although 7.A．should B．shouldn’t C．mustn’t D．can’t 8.A．have to B．should C．mustn’t D．don’t have to 9.A．is protected B．protects C．protected D．was protected 1 / 12 学科网（北京）股份有限公司 $