专项复习：情态动词系统复习-2025-2026学年九年级英语下册语法知识点全解（教科版五四制）

9年级专项复习教科版（五四制） 【专项复习】 A版知识点全解 专项复习 【专题】情态动词系统复习 语法专项突破 考频分析 初三教科版（五四制）中，情态动词是重点语法模块，考频占词法总量的15%左右，贯穿试卷所有 核心题型：单项选择2-3题、完形填空2-3题、语法填空1-2题、书面表达核心考察，直接影响句 子完整性与准确性。在语境理解类题目中，情态动词的语气表达、推测用法及词义辨析往往是解题 关键。 考查内容 。情态动词的基本用法与常见搭配 ·情态动词的否定形式与疑问结构 。情态动词的推测用法 知识点一：情态动词的基本用法与常见搭配 1.can/could(能力、许可、可能性) 。基本含义 can:表示现在的能力(“能，会”)、许可（口语中，“可以”）、理论可能性(“可能”)：could: 表示过去的能力、委婉请求（比can更礼貌）、过去的可能性。 ·句型结构 肯定句：主语+can/could+动词原形；否定句：主语+can’t/couldn’t+动词原形；疑问句： Can/Could+主语+动词原形？ 。例句： 1.I can speak English fluently..(现在能力，can+speak) 2.Could you please open the window?(委婉请求，could+open) 3.It can be very hot in summer here..(理论可能性，can+be) 4.She couldn't swim when she was five.(过去能力否定，couldn't+swim) 2.may/might(许可、可能性、请求) 9年级专项复习教科版（五四制） 【专项复习】 A版知识点全解 。基本含义 may:表示许可（正式，“可以”)、可能性(“可能”，比can更正式)：might:表示过去的许可、 可能性（比may可能性更低）、委婉请求。 ·句型结构 肯定句：主语+may/might+动词原形；否定句：主语+may not/might not+动词原形(may not 表“不允许”，might not表“可能不”)：疑问句：May/Might+主语+动词原形？(may用于请求 许可，might更委婉) 。例句： 1.You may leave the classroom now.(许可，may+leave) 2.It might rain this afternoon.(低可能性，might+rain) 3.May I borrow your dictionary?(请求许可，MayI+borrow) 4.She might not come to the party tonight..(可能不，might not+cone) 3.must/have to(必须、肯定推测) 。基本含义 must:表示主观必须(“必须”)、肯定推测(“一定”，用于肯定句)：have to:表示客观需要(“不 得不”)，有人称和时态变化(has to/had to/will have to)。 ·句型结构 must肯定句：主语+must+动词原形：否定句：主语+nustn’t+动词原形（表“禁止”)：疑 问句：Must+主语+动词原形？（否定回答用needn’t或don’t have to) have to肯定句：主语+have/has/had/will have to+动词原形；否定句：主语+don't/doesn't/didn' twon't have to+动词原形；疑问句：Do/Does/Did/Will+主语+have to+动词原形？ ·例句： 1.We must follow the school rules.(主观必须，must+follow) 2.He has to work late tonight because of the project.(客观需要，has to+work) 3.This book must be Mary's.(肯定推测，must+be) 4.You mustn't smoke in public places.(禁止，mustn’t+smoke) 5.Must I finish the task today?一No,you needn't.(must疑间句否定回答，needn’t) 4.need/had better(需要、建议) ·need的用法（情态动词/实义动词） 情态动词：用于否定句和疑问句，表“需要”，结构：needn't+动词原形（否定，“不必”）：Need +主语+动词原形？（疑问，“需要…吗？”） 实义动词：有人称和时态变化，结构：主语+need(s)needed+to do sth.(“需要做某事”)：否定 句：主语+don’t/doesn't/didn'tneed+to do sth ·had better的用法 表“最好做某事”，结构：had better(not)+动词原形(had可缩写为'd,否定直接加not),无 人称变化，用于提建议。 ·例句： 9年级专项复习教科版（五四制） 【专项复习】 A版知识点全解 l.You needn't wait for me..(情态动词否定，needn't+wait) 2.Does he need to go there now?(实义动词疑问，Does+need to go) 3.We'd better start early tomorrow.(建议，had better+stat) 4.You had better not eat too much junk food.(否定建议，had better not+eat) 5.should/.ought to（应该、建议、责任) ·基本含义 should和ought to都表示“应该”，should更常用，ought to稍正式，两者含义相近，否定形式为 shouldn’t和ought not to。 。句型结构 肯定句：主语+should/ought to+动词原形：否定句：主语+shouldn’t/ought not to+动词原形： 疑问句：Should+主语+动词原形？ ·例句： l.You should study harder for the exam.(建议，should+study) 2.We ought to help the elderly..(责任，ought to+help) 3.He shouldn't spend too much time playing games.(否定建议，shouldn't+spend) 4.Should we tell him the truth?(疑间，Should we+tell) 6.will/would(意愿、习惯、请求) ●wil的用法 表示主观意愿(“愿意”)、将来时助动词（已在时态中涵盖）、习惯性动作(“总是”)、请求（用 于第二人称疑问句，“…好吗？”)。 。would的用法 表示过去的意愿(“过去愿意”)、委婉请求（比wl更礼貌）、过去的习惯性动作(“过去常常”， 可与used to互换，但used to可表状态，would仅表动作)。 ·例句： l.I will help you with your homework.(意愿，will+help) 2.Will you please pass me the salt?(请求，Will you+pass) 3.When he was young,he would swim in the river every summer..(过去习惯，would+swim) 4.She said she would come to see us.(过去意愿，would+come) 知识点二：情态动词 1.基础含义及用法（中考必背） ·can/could(能力、许可、请求)→例句：She can speak three languages.(能力)/Could you pass me the pen?(请求，委婉) ●may/might(许可、可能性)一例句：You may leave the room now.(许可)/It might rain tomorrow. (可能性) 3 9年级专项复习教科版（五四制） 【专项复习】 A版知识点全解 ·must/have to(必须、不得不)→例句：We must follow the school rules..(主观必须)/She has to stay at home because of the rain.(客观不得不) ·will/would(意愿、习惯)→例句：I will help you with your English.(意愿)/She would always read before bed.(过去习惯) ·should/ought to(建议、责任)→例句：You should finish your homework first.(建议)/We ought to protect the environment.(责任) 。need(需要)→例句：You needn't come so early.(不必，情态动词)/We need to buy some milk.(实 义动词，后接todo) 2.否定形式与疑问结构（中考易错）》 。否定形式： 1.can→can't/cannot;could→couldn't→例句：Ie can't swim across the river. 2.may→may not;must→must't(禁止)→例句：You mustn't park here, 3.need→needn't(情态动词否定)；don't need(实义动词否定)一→例句：You needn't woIry./I don't need your help ·疑问结构： 1.将情态动词提前→例句：Can you speak French?/Should we go now? 2.need作实义动词时：Do you need to go?(需借助助动词) 3.推测用法（中考难点) ·must（肯定推测，“一定”)一→例句：The light is on,so he must be at home. 。may/might(可能性推测，“可能”)→例句：She may come to the party tonight. 。can't(否定推测，“不可能")→例句：He can't be in the library,I saw him go out.. 。could(委婉推测或过去可能性)→例句：That could be the right answer./She could swim when she was five 考法精析 考法一：情态动词表推测的用法辨析 核心：根据语境中可能性程度或否定推测的语气，选择正确的情态动词(must/may/might/can't) 真题1（语法填空)： The door is locked.He be at home now. 答案：can't 解析：由“门是锁着的”这一依据可知，对“他在家”进行否定推测，语气较强，应用cat（不可 4 9年级专项复习教科版（五四制） 【专项复习】 A版知识点全解 能)。 真题2（完形填空)： -Where is Lucy? -She be in the library.I saw her go there just now. A.must B.may C.might D.can't 答案：A 解析：由“刚才看见她去那里了”这一明确依据可知，对“她在图书馆”进行肯定推测，语气最强， 应用must（一定)。 考法二：情态动词与非谓语动词结合 核心：根据语境判断情态动词后接的非谓语动词形式（原形、todo或doing) 真题1（语法填空）： You should(finish)your homework before watching TV. 答案：finish 解析：情态动词should后接动词原形，finish用原形。 真题2（单项选择)： The teacher advises us-more English books. A.read B.to read C.reading D.reads 答案：B 解析：advise sb.to do sth.为固定搭配，意为“建议某人做某事”，此处用to read。 考法三：情态动词与非谓语动词的综合应用 核心：结合语境判断情态动词的含义及用法，同时正确搭配非谓语动词(todo/doing/do)的形式 真题1（单项选择)： Youfinish your homework first before watching TV.It's betterplan your time carefully. A.must;to B.may:to C.can;/D.need;/ 答案：A 解析：第一空根据语境“必须先完成作业”表主观必须，用must:第二空为固定句型“It's better to do sth.”(最好做某事)，需用不定式to plan,故选A。 真题2（语法填空)： The teacher advises us_(practise)-(speak)English every day.We should follow his advice. 答案：to practise speaking 解析：第一空“advise sb.to do sth.”(建议某人做某事)，用不定式to practise;第二空“practise doing sth.”(练习做某事)，用动名词speaking,故填to practise speaking。 解题小妙招 5 9年级专项复习教科版（五四制） 【专项复习】 A版知识点全解 情态动词解题妙招 推测用法看语气，肯定must强may/might弱：否定推测用cant,依据语境辨清晰： 情态动词后接动，原形跟随不含糊：非谓搭配要牢记，todo/doing看动词： avoid finish后doing,advise sb后todo;综合运用先选情态，再按规则配非谓。 真题演练 演练一：单项选择试题 1.You be quiet in the library.Everyone is reading. A.can B.must C.may D.might 2.-I borrow your dictionary? -Sure,here you are. A.Must B.Should C.Could D.Need 3.Shehave told me the news earlier.Now it's too late. A.can B.should C.must D.may 4.My mother often tells metoo much time playing computer games. A.not to spend B.to not spend C.don't spend D.not spend 5.They enjoy basketball with their friends after school A.play B.to play C.playing D.played 6.You_worry about me.I can take care of myself. A.mustn't B.needn't C.can'tD.shouldn't 7.It's important English every day. A.practice B.to practice C.practicing D.practiced 8.The girl isyoung-go to school alone. A.too;to B.enough;to C.so;that D.such;that 9.Hebe at home because the lights are off A.must B.may C.can't D.should 10.The teacher advises us more exercise to keep healthy. A.do B.to do C.doing D.did 演练二：填空试题 1.You(must)play football in the street.It's dangerous. 2.She needs(finish)her homework before dinner. 3.We_(should)have arrived earlier,but the bus was late. 6 9年级专项复习教科版（五四制） 【专项复习】A版知识点全解 4.My father often tells me(not swim)in the river alone. 5.It's too cold outside.You had better(wear)a warm coat. 6.The students are looking forward to(visit)the science museum. 7.You _(not have to)come tomorrow if you are busy. 8.He is old enough(drive)a car now. 9.The light is on.He(must)be in his room. 10.They decided(go)to the beach for vacation. 演练三：语法填空试题 My name is Tom.I'm a 9th-grade student.Last week,my teacher told us we-(must)prepare for an English exam.I(should)have started reviewing earlier,but I was busy with other subjects.Now I need (study)hard every day. My mother advises me_(make)a study plan.She says it's important_(manage)time well.I enjoy (learn)English,but sometimes I avoid(speak)in class because I'm shy.My friend Lucy told me, "You(dare)not be afraid!Practice makes perfect." Yesterday,I finished_(read)a storybook in English.It was interesting!I think I_(can)improve my English if I keep trying.Tomorrow,I(had better)get up early to review grammar rules 答案区 演练-：1B2.C3B4.A5.C6B7.B8.A9.C10B 1.mustn't 2.to finish 3.should 4.not to swim 5.wear 6.visiting 7.don't have to 8.to drive 9.must 10.to go 1.must 2.should 3.to study 4.to make 5.to manage 6.learning 7.speaking 8.dare 9.reading 10.can 7