动词专项03-2025-2026学年英语中考复习语法知识点全解（外研版)

初三下册外研版 【寒假专版】 A版知识点全解 寒假专版 【专题】情态动词 动词专项突破 考频分析 初三外研版中，情态动词是动词专项的重点语法点，考频占动词模块的15%左右，贯穿试卷核心 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，直接影响语气准确 性与语境合理性。在语境理解类题目中，情态动词的语气辨析（许可/推测/义务）及情态动词+have done的过去推测/责备用法往往是解题关键。 考查内容 。核心语义辨析：can/could表能力或请求、may/might表许可或推测、must/should表义务或建议的语 境匹配 ·时态与推测：情态动词+have done结构对过去行为的推测（如must have done)与责备语气（如 should have done)的区分 。句式功能：情态动词在疑问句（请求/许可）、陈述句（推测/义务）中的语法功能及答句规范（如 MayI..的肯定/否定回应) 知识点一：情态动词的分类及基础用法 1.can/could(能力/请求) ·表能力：I can speak English.(我会说英语。) 。表请求：Could you help me?(你能帮我吗？) 2.may/might(许可/推测) ●表许可：You may leave now.(你现在可以离开了。) 。表推测：HIe might be at home..(他可能在家。) 3.must/should（义务/建议) ·表义务：You must follow the rules.(你必须遵守规则。) 。表建议：You should study hard.(你应该努力学习。) 初三下册外研版 【寒假专版】A版知识点全解 4.情态动词+have done（表过去推测/责备) 。表过去推测：She must have arrived.（她一定已经到了。) 。表责备：You should have told me.(你本应该告诉我。) 知识点二：情态动词用法分类及易错点 1.can/could(能力/请求) 1.表能力（现在/过去） 。结构：主语+can(现在)/could(过去)+动词原形 ·例句： 1.I can speak English fluently.(现在能力，用can+speak) 2.She could swim when she was five.(过去能力，用could+swim) 2.表请求（委婉程度：could>can) ●结构：Can/Could+主语+动词原形？ ·例句： 1.Can you pass me the pen??(普通请求，用Can+pass) 2.Could you help me with my homework?(委婉请求，用Could+help) 2.may/migt(许可/推测) 1.表许可（口语中may较正式，might更委婉) 。结构：May/Might+主语+动词原形？（疑问句）：主语+may/might+动词原形（肯定句） ·例句： l.May I come in?(请求许可，用May+come) 2.You might leave early today..(允许，用might+leave) 2.表推测（可能性：my>might,用于肯定句/否定句，不用于疑问句） 。结构：主语+may/might+动词原形（对现在/将来推测） ·例句： 1.She may be at home now.(现在推测，用may+be) 2.They might go to the park tomorrow.(将来推测，用might+go) 3.must/should(义务/建议) 1.must表义务（”必须”，语气强硬) 2 初三下册外研版 【寒假专版】 A版知识点全解 。结构：主语+must+动词原形：否定句：nustn't(”禁止”) 。例句： l.You must finish your homework before dinner.(义务，用must+finish) 2.You mustn't play with fire.（禁止，用mustn't+play) 2.should表建议（”应该”，语气较委婉) ·结构：主语+should+动词原形：否定句：shouldn't(”不应该') ·例句： l.You should eat more vegetables.(建议，用should+eat) 2.He shouldn't spend too much time on games.（不建议，用shouldn't+spend) 4.情态动词+have done(表过去推测/责备) l.肯定推测：must have done(”一定做过”，语气肯定) 。例句：The ground is wet.It must have rained last night.（对过去动作的肯定推测，用must have rained) 2.可能性推测：may/might have done(”可能/或许做过”，可能性由may到might递减) 。例句：She may have gone to the library..(可能去过，用may have gone) 3.否定推测：can't have done(”不可能做过”，用于否定句) ●例句：He can't have finished the work in an hour.(不可能完成，用can't have finished) 4.责备：should have done(”本应该做但没做”)；shouldn't have done(”本不应该做但做了”) 。例句： l.You should have told me the truth.(本应该告诉，用should have told) 2.He shouldn't have broken the window.（本不应该打破，用shouldn't have broken) 知识点三：情态动词 1.can/could(能力/请求) 1.can表能力（现在/将来）→例句：She can speak three languages.. 2.could表能力（过去）→例句：I could swim when I was five. 3.can表请求（口语，非正式）→例句：Can you pass me the pen'? 4.could表请求（更委婉）→例句：Could you help me with my bag?? 5.can表允许（口语）→例句：You can go home now. 3 初三下册外研版 【寒假专版】 A版知识点全解 6.could表推测（可能性较小）→例句：This could be the right answer. 7.can't表否定推测（不可能）→例句：He can't be in the classroom;I just saw him outside. 2.may/might(许可/推测) 1.may表许可（正式）→例句：You may leave the room after class.. 2.might表许可（更委婉，较少用）例句：Might I use your phone? 3.may表推测（可能，用于肯定句）→例句：She may come to the party tonight. 4.might表推测（可能性比may小）→例句：It might rain tomorrow. 5.may not表禁止（正式）→例句：You may not smoke here. 6.might not表推测（可能不）→例句：He might not agree with the plan. 7.MayI?的肯定▣答：Yes,you may../Yes,please.→例句：一May I open the window?一Yes,you may. 3.must/should（义务/建议) 1.must表义务（必须，主观）→例句：We must follow the school rules.. 2.have to表义务（必须，客观）→例句：I have to finish the work today because of the deadline. 3.mustn't表禁止（绝对不允许）→例句：You mustn't play with fire. 4.should表建议（应该）→例句：You should eat more vegetables. 5.shouldn't表建议（不应该）→例句：He shouldn't spend too much time on games. 6.must表肯定推测（一定）→例句：The light is on;he must be at home. 7.should表推测（按理应该）→例句：They should arrive here by6p.m. 4.情态动词+have done(表过去推测/责备) l.must have done(过去一定做了)一→例句：He must have finished his homework,because he's watching TV now. 2.can't have done(过去不可能做了)一→例句：She can't have gone to Beijing;I saw her this morning 3.may/might have done(过去可能做了)一例句：They may have arrived at the station already. 4.should have done(过去本应该做却没做)→例句：You should have told me the truth earlier. 5.shouldn't have done(过去本不应该做却做了)→例句：He shouldn't have broken the window. 6.needn't have done(过去本不必做却做了)→例句：You needn't have bought so much food;:we have enough 4 初三下册外研版 【寒假专版】 A版知识点全解 考法精析 考法一：情态动词can/could的用法辨析 核心：根据语境判断can/could表示能力、请求或推测，区分现在/过去时态及语气委婉程度 真题1（语法填空)： She(ride)a bike when she was five,but now she(not ride)very well. 答案：could ride,can'tride 解析：第一空由时间标志词'when she was five'”可知表示过去的能力，用could+动词原形：第二空 由'now”可知表示现在的能力，否定形式用can't+动词原形。 真题2（单项选择)： you help me carry the books to the classroom? Sure,I_ A.Could;could B.Can;can C.Could;can D.Can;could 答案：C 解析：问句表示委婉请求用Could;回答请求时用can表示能力许可，不能用could。 考法二：情态动词用法辨析 核心：根据语境判断情态动词表能力、请求、许可、推测、义务或建议等含义，选择正确的情态动 词形式 真题1（语法填空)： She_swim very well when she was five years old. 答案：could 解析：由时间标志词“when she was five years old”可知，表过去的能力，用could.。 真题2（单项选择)： -I use your dictionary? -Sure,here you are. A.Must B.Should C.May D.Need 答案：C 解析：根据语境“我可以用你的字典吗？”表请求许可，may符合语境：must表必须，should表应 该，need表需要，均不符合。 考法三：情态动词的综合辨析与语境运用 核心：结合语境区分情态动词表能力、请求、推测、义务等用法，掌握，情态动词+have done'”结 构的过去推测与责备含义 真题1（单项选择）： -Whose guitar is this?It looks new. -I'm not sure.Itbelong to Alice.She likes playing the guitar. A.must B.might C.can't D.should 5 初三下册外研版 【寒假专版】 A版知识点全解 答案：B 解析：根据答句T'm not sure'”(不确定)可知，此处表可能性较小的推测，用might:must表肯定 推测（一定），cn't表否定推测（不可能），should表建议（应该），均不符合语境。 真题2（语法填空)： You _(should tell)me you would be late.I waited for you for an hour in the rain! 答案：should have told 解析：根据语境”我在雨中等了你一小时，可知，此处表”本应该做但没做”的责备，用”should have +过去分词”结构，tel的过去分词为told.。 解题小妙招 情态动词妙招 能力请求和推测，can/could来辨析； 过去能力用could,现在能力can体现： 委婉请求用could,回答许可can来填： 请求许可may常用，must应该should选。 真题演练 演练一：单项选择（共10题） 1.I swim when I was seven,but now I-because of an injury. A.can;can't B.could;can't C.could;couldn't D.can;couldn't 2.-I borrow your pen for a minute? -Sorry,you_.I need it now. A.May,mustn't B.Might;may not C.May,can't D.Must;needn't 3.You follow the traffic rules when crossing the road.It's dangerous to run A.must B.may C.can D.might 4.-you help me carry the heavy box? -Sure,I_. A.Could;could B.Can;could C.Could;can D.Must;can 5.She be at home now.Her coat is still on the chair. A.must B.can't C.may not D.should 6.You have told me the meeting was cancelled.I waited for two hours! A.must B.should C.could D.might 7.-Is Lucy in the library? -She be,but I'm not sure. 6 初三下册外研版 【寒假专版】 A版知识点全解 A.must B.can C.might D.should 8.Heswim across the river when he was young,but now he_. A.could;can B.can;couldn't C.can;can't D.could;can't 9.Yousmoke in the hospital.It's against the rules. A.needn't B.mustn't C.maynot D.couldn't 10.-I leave the classroom early today? -No,you_.You have to finish the test first. A.Might;mustn't B.May;needn't C.Can;can't D.Must;may not 演练二：填空（共10题） 1.My brother(play)the piano very well when he was ten. 2.You(not eat)too much candy.It's bad for your teeth. 3.-you pass me the salt,please? -Yes,I 4.She_(be)at the park now.I saw her go there just now. 5.They(not arrive)yet.The train is usually late. 6.You(ask)the teacher for help if you don't understand the question. 7.He(not swim)in the river.It's too deep and dangerous. 8.We(finish)our homework before dinner yesterday,but we forgot. 9.-I use your computer for a while? -Sorry,you_My brother is using it now. 10.The ground is wet.It(rain)last night. 演练三：语法填空 It was Sunday morning.Tom-(1)(not get)up early because he had no classes.His mom said,"Tom,you (2)(help)me clean the house today."Tom replied,"Mom,I(3)(go)to the bookstore with Jack this afternoon.Could I clean it after I come back?His mom smiled and said,"Yes,you_(4).But you(5) (not forget)to finish it before dinner." At the bookstore,Tom saw a new storybook.He_(6)(read)a few pages and thought it was interesting.He wanted to buy it,but he(7)(not find)his wallet."I(8)(leave)it at home,"he thought.Just then,Jack said,"You(9)(borrow)mine if you want.I brought extra money today."Tom thanked Jack and said,"I _(10)(return)it to you tomorrow." 7 初三下册外研版 【寒假专版】 A版知识点全解 答案区 演练-：1-5 BCACA6-10 BCDBC 演练二：1.could play2.shouldn'teat3.Could/Can,can4.must be5.may not have arrived6.should ask 7.mustn't swim 8.should have finished 9.May/Might;can't 10.must have rained 演练三：1.needn'tget2.must help3.might go4.may/can5.mustn't forget6.could read7.couldn't find 8.must have left 9.can/may borrow 10.will return P