含情态动词的被动语态should be allowed to 等-2025-2026学年九年级英语全一册语法知识点全解（人教版）

初三全一册人教版 【语法专版】 核心语法精解 语法专版 含情态动词的被动语态(should be allowed to等) 语法专项突破 考频分析 初三人教版中，含情态动词的被动语态(should be allowed to等)是重点语法模块，考频占语法总 量的15%左右，主要分布在核心题型：单项选择1-2题、完形填空1-2题、语法填空1-2题、书面 表达（核心考察，直接影响句子规范性与语境合理性）。在语境理解类题目中，情态动词的含义及 被动语态的结构往往是解题关键。 考查内容 ·结构构成：情态动词+be+过去分词的基本框架（如should be allowed to、must be done等） ·情态意义：不同情态动词(can、may、must、should等)表达的语气差异（能力、许可、义务、推 测等) 。语境转换：主动语态与含情态动词的被动语态的句式转换规则及语境应用场景 知识点一：含情态动词的被动语态 1.基本结构（情态动词+be+过去分词） 1.常见情态动词：should(应该)、can(能/何以)、may(可以)、must(必须)、need(需要) 2.例句： ·Teenagers should be allowed to make their own decisions.(should be allowed:应该被允许) 。The work must be finished by Friday..(must be finished:必须被完成) 2.否定形式（情态动词+not+be+过去分词) 1.结构示例：should not be allowed(不应该被允许)、can not be done(不能被做) 2.例句：This book can't be taken out of the library.(can't be taken:不能被带出) 初三全一册人教版 【语法专版】 核心语法精解 3.疑问形式（情态动词+主语+be+过去分词) 1.结构示例：Should.be allowed?（是否应该被允许)、Can.be used?（是否能被使用) 2.例句：Should the window be closed now?(should.be closed:是否应该被关上) 知识点二：含情态动词的被动语态 1.情态动词被动语态基本结构 1.肯定式：主语+情态动词(can/may/must/.should/need等)+be+动词过去分词 例句： ☐The work can be finished in two hours.(can be+finish的过去分词finished) ☐Children should be allowed to choose their own hobbies.(should be+allow的过去分词allowed) 2.否定式：主语+情态动词+not+be+动词过去分词 例句： 口This book must not be taken out of the library.(must not be+take的过去分词taken) 口The door shouldn't be left open at night.(shouldn'tbe+leave的过去分词left) 3.疑问式：情态动词+主语+be+动词过去分词？ 例句： 口Can this problem be solved by Tom?(Can+主语+be+solve的过去分词solved) 口Should the meeting be held tomorrow?(Should+主语+be+hold的过去分词held) 2.常见情态动词的被动语态用法 1.can(能/会)：表示能力或可能性的被动 例句：English can be spoken in many countries..(英语能在许多国家被说) 2.my(可以/可能)：表示许可或推测的被动 例句：The story may be written by a famous writer.(这个故事可能由一位著名作家所写) 3.must(必须/一定)：表示义务或肯定推测的被动 例句：Homework must be handed in on time.(作业必须按时上交) 4.should(应该：表示建议或责任的被动 例句：More attention should be paid to environmental protection.(应该更关注环境保护) 5.eed(需要)：表示需要的被动（多用于否定句/疑问句) 例句：The machine needn't be repaired now.(这台机器现在不需要被修理) 3.注意事项 1.情态动词后必须接动词原形，被动语态中“be”为原形，不可更换时态 错误：The task should was finished yesterday.(应为should be finished) 初三全一册人教版 【语法专版】 核心语法精解 2.不及物动词无被动语态，需添加介词后构成被动 例句：This song is often listened to by young people.(listen为不及物动词，需加to) 3.被动语态中动作执行者可由“by+宾语”表示，若无需强调可省略 例句：The letter was written by her)last night.(可省略by her) 知识点三：含情态动词的被动语态 1.基本结构 1.情态动词+be+过去分词 中考必背情态动词：can,may,must,should,,need ☐can be done(能被…)→例句：The work can be finished in an hour.. ☐may be done（可以被…)→例句：This book may be borrowed from the library. 口must be done(必须被…)→例句：Homework must be handed in on time. ☐should be done(应该被…)→例句：Children should be allowed to play outside. ☐need be done(需要被…)→例句：The machine needs be repaired. 2.否定结构 1.情态动词+not+be+过去分词（中考易错） 口cannot be done(不能被…)→例句：This problem cannot be solved easily 口should not be done（不应该被…)→例句：Litter should not be thrown everywhere. ☐need not be done(不必被…)→例句：The meeting need not be held today 3.疑问结构 1.情态动词+主语+be+过去分词（中考常考） ☐Can it be done?(它能被完成吗？)→例句：Can this task be finished by Friday? ☐Should they be allowed to go?(他们应该被允许去吗？)→例句：Should students be allowed to use phones in class? 口Must the work be done now?(这项工作必须现在做吗？)例句：Must the project be handed in tomorrow? 考法精析 考法一：基本结构与否定形式辨析 核心：识别含情态动词被动语态的基本结构（情态动词+b+过去分词）及否定形式（情态动词 +not+be+过去分词)，判断语法正确性 真题1（语法填空）： 3 初三全一册人教版 【语法专版】 核心语法精解 The old photos_(should keep)in a safe place.They are very precious. 答案：should be kept 解析：根据基本结构“情态动词+be+过去分词”，主语photos与keep为被动关系，should后需接 be+过去分词，keep的过去分词为kept。 真题2（单项选择)： These mistakes-be corrected at once.They are too serious. A.shouldn't B.needn't C.must D.can't 答案：C 解析：句意为“这些错误必须立即被纠正”，强调必要性，用must be corrected:A表“不应该”，B 表“不需要”，D表“不能”，均不符合语境。 考法二：情态动词被动语态的句式转换与语义辨析 核心：结合基本结构与语义差异，完成主动语态与被动语态的转换，并辨析不同情态动词表达的语气 真题1（句型转换)： People must protect the environment.(改为被动语态) 答案：The environment must be protected by people 解析：原句为主动语态，情态动词ust表“必须”，被动语态结构为“情态动词+be+过去分词”， protect的过去分词为protected。 真题2（单项选择)： These flowers_every day. A.needn't be watered B.needn't to be watered C.don't need be watered D.need be watered 答案：A 解析：need作情态动词时，被动结构为“needn'tbe+过去分词”，用于否定句，water的过去分词为 watered:B项多to,C项实义动词用法应为don't need to be watered,D项肯定句中need作情态动 词需用need to be done. 考法三：含情态动词的被动语态综合运用 核心：掌握情态动词被动语态的肯定、否定、疑问形式，结合语境判断情态意义及特殊句式转换 真题1（单项选择)： This difficult problem_by Tom because he is good at math. A.must solve B.must be solved C.can solve D.need be solved 答案：B 解析：主语”problem”是动作”solve”的承受者，需用被动语态，排除A、C;根据he is good at math 表肯定推测，用must be solved(一定被解决)，need表需要时多用于否定/疑问句，此处不符合语境。 4 初三全一册人教版 【语法专版】 核心语法精解 真题2（句型转换)： The students should hand in their homework before Friday.(改为被动语态) Homework_ _by the students before Friday 答案：should be handed in 解析：原句含情态动词should,被动语态结构为”情态动词+be+过去分词”；hand in为固定短语， 被动语态中in不可省略，hand的过去分词为handed,故填should be handed in。 解题小妙招 情态被动妙招 情态被动看结构，情态+be+过去分词： 否定直接加not,情态not be加done: 转换主动变被动，情态保留主语换： 语义辨析看语境，必要可能和许可： must表必须，can表许可，need否定用needn't: 主谓被动要分清，be动词来帮你定： 牢记结构和语义，综合应用不费力。 真题演练 演练一：单项选择试题（共10题） 1.The classroom_cleaned every day to keep it tidy A.must be B.must C.can be D.should 2.These old lettersthrown away.They have great meaning. A.needn't be B.shouldn't be C.must be D.can be 3.-the homework be finished today? -No,you can hand it in tomorrow. A.Must B.Should C.Need D.May 4.The machinerepaired by an expert,or it will break down again. A.can be B.must be C.may be D.need be 5.This word in the dictionary if you don't know its meaning. A.can look up B.can be looked up C.must look up D.should be looked 6.These flowers_every morning,or they will die. A.need water B.need to water C.need to be watered D.need be watered 7.-Can the lost keys_in the library? -I'm not sure.Let's go and check. A.find B.be found C.be finded D.are found 初三全一册人教版 【语法专版】 核心语法精解 8.The rules to all students,or there will be confusion. A.must explain B.must be explained C.should explain D.can be explaining 9.The truth_by no one here.Everyone is afraid of the result. A.dare not be mentioned B.needn't be mentioned C.mustn't mention D.can't mention 10.-Shouldn't the room before the guests arrive? -Yes,it should.I'll do it right now. A.clean B.be cleaning C.be cleaned D.cleaned 演练二：填空试题（共10题） 1.The environment-(protect)by everyone.(must) 2.This question_(answer)in two different ways.(can) 3.The door(open)with this key.(may) 4.These books_(take)out of the library.(not allow,should) 5.The work(finish)by Friday.(must) 6.The baby_(look after)carefully.(need) 7.This mistake(avoid)if you are careful.(can) 8.The problem_(solve)immediately.(have to) 9.The light_(turn off)when you leave the room.(should) 10.These clothes _(wash)by hand.(not need,must) 演练三：语法填空试题（共10空） Nowadays,more and more people realize that environmental protection is important.The air,water and land-(1.protect)by all of us.For example,plastic bags_(2.not use)too often because they are hard to break down.Instead,cloth bags_(3.use)when shopping. In schools,students learn that trees_(4.plant)every year to make the earth greener.Also,waste paper and bottles-(5.recycle)to save resources.Some students wonder,"(6.the old textbooks reuse)by younger students?"The answer is yes!Old textbooks-(7.pass)on to others instead of being thrown away. At home,parents often tell children that lights_(8.turn off)when leaving a room,and water_(9.not waste).Even small actions_(10.make)a big difference to the environment. 参考答案 演练-：1.A2B3.A4.B5B6.C7B8B9.A10.C 6 初三全一册人教版 【语法专版】 核心语法精解 演练二 1.must be protected 2.can be answered 3.may be opened 4.should not be allowed to be taken 5.must be finished 6.needs to be looked after 7.can be avoided 8.has to be solved 9.should be turned off 10.must not need to be washed 演练三： 1.must be protected 2.should not be used 3.should be used 4.should be planted 5.should be recycled 6.Can the old textbooks be reused 7.can be passed 8.should be turned off 9.should not be wasted 10.can be made 7