情态动词must might could cant表推测-备战2025-2026学年九年级英语上学期期末语法全解（人教版）

ENGLISH-初三全一册资料（人教版） Chapter1情态动词must/might/could/can't表推测 考频分析 情态动词must/might/could/can't表推测是中考英语情态动词的重要考点，考频占情态动词考点的30%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)、阅读理解（词义猜测题涉及）。在语 境理解类题目中，情态动词表推测的语气强弱(must表肯定推测、might/could表可能推测、can't表否定 推测)及上下文逻辑关系往往是解题关键。 考查内容 中考对情态动词表推测的考察聚焦三大维度，覆盖基础用法与语境应用： ·推测语气强度：must(肯定推测)、might/coud(可能推测)、cant(否定推测)的语气差异与场景匹配； ·时态语境适配：must/might/could/.can't+动词原形表对现在情况的推测，must/might/coud/can't+have done表对过去情况的推测； ·句式功能辨析：在陈述句中表推测的基本用法，在疑问句中can/could表推测的特殊应用(might/could 可用于疑问句，must/can't一般不用于疑问句表推测)。 精讲精练 知识点一：情态动词must/might/could/can't表推测 ·ust(肯定推测，“一定；肯定”，可能性极高) 一用于肯定句，后接动词原形 -例句：口He must be at home now.(他现在一定在家。)☐The book must belong to Tom.(这本书肯 定是汤姆的。) ·might//could(可能推测，“可能；也许”，可能性较低，might比could更不确定) -用于肯定句或否定句（否定句中表“可能不”，不如can't肯定），后接动词原形 -例句：口It might rain tomorrow.(明天可能会下雨。)口She could be late for the meeting.(她开会可 能会迟到。)口He might not come today.(他今天可能不来了。) ·can't(否定推测，“不可能”，可能性为零) 一用于否定句，后接动词原形 -例句：口That can't be Lucy..She has gone to Beijing.(那不可能是露西。她去北京了。)·He can't speak French.(他不可能会说法语。) 【即学即练】 1.【推测语气判断】-The light in his room is on.Who is in it？--Itbe Tom.He is the only one who has the key. A.might B.could C.must D.can't 2.【否定推测用法】请用can't完成句子：That_一(be)Mike.He has gone to Shanghai. 3.【可能性程度辨析】hich word shows the lowest possibility of speculation? A.must B.might C.can't D.could 4.【基本用法应用】用合适的情态动词填空：She_not come to school today because she is ill..(可 能性较低) 5.【句式判断】情态动词must表推测时，通常用于一句（填“肯定”/“否定”/“疑问”），can't表推 测时用于句。 初三|英语引人教版 ENGLISH-初三全一册资料（人教版） 知识点二：情态动词表推测的句式和时间应用 ·对现在情况的推测（与现在事实相关） 1.基本句式结构 -肯定句：主语+must/might/coud/can't+动词原形 一否定句：主语+can't/might not+动词原形(might not表示”可能不”，can't表示”不可能”) -疑问句：Can/Could+主语+动词原形？（表推测时一般不用must提问） 2.时间状语标志 -now(现在)、at present(目前)、today(今天)、this week(本周)、look(看)、listen(听)等现 时性词语 3.例句应用 -a.He must know the answer now.(他现在肯定知道答案。) -b.She can't be in the classroom at present..(她现在不可能在教室。) -c.Could they be playing basketball?(他们可能在打篮球吗？) ·对过去情况的推测（与过去事实相关） 1.基本句式结构 -肯定句：主语+must/might/could/can't+have+过去分词 -否定句：主语+can't/might not+have+过去分词 -疑问句：Can/Could+主语+have+过去分词？ 2.时间状语标志 -yesterday(昨天)、last week(上周)、just now(刚才)、an hour ago(-小时前)、in2020(在 2020年)等过去时间词 3.例句应用 -a.She must have finished her homework yesterday.(她昨天肯定完成作业了。) -b.They can't have gone to Beijing last week.(他们上周不可能去北京。) -c.Could he have forgotten the meeting?(他可能忘了会议吗？) ·对将来情况的推测（与未来事实相关） 1.基本句式结构 -肯定句：主语+must/might/could/can't+动词原形（将来时间） -否定句：主语+cant/might not+动词原形 -疑问句：Can/Could+主语+动词原形？ 2.时间状语标志 -tomorrow(明天)、next week(下周)、soon(很快)、in the future(将来)等将来时间词 3.例句应用 -a.It must rain tomorrow.(明天肯定会下雨。) -b.She might not come to the party next week.(她下周可能不来参加聚会。) -c.Could they arrive at8o'clock?(他们可能8点到0吗) ·进行时态的推测（强调动作正在进行） 1.现在进行推测 -结构：主语+must/might/could/can't+be+现在分词 -例句：He must be sleeping now.(他现在肯定在睡觉。) 2.过去进行推测 -结构：主语+must/might/could/can't+have been+现在分词 -例句：They must have been waiting for us at that time.(那时他们肯定一直在等我们。) 3.将来进行推测 -结构：主语+must/might/could/.can't+be+现在分词（将来时间） -例句：She might be traveling in Europe next month.(下个月她可能正在欧洲旅行。) ·被动语态的推测（强调被动关系） 1.现在被动推测 -结构：主语+must/might/could/can't+be+过去分词 -例句：The room must be cleaned every day.(房间肯定每天都被打扫。) 2.过去被动推测 -结构：主语+must/might/could/.can't+have been+过去分词 -例句：The letter must have been sent last week.(信肯定上周就被寄出了。) 3.将来被动推测 -结构：主语+must/might/could/can't+be+过去分词（将来时间） -例句：The building might be completed next year..(这座大楼可能明年完工。) 知识点三：情态动词表推测的易错点与特殊用法 ·疑问句中的情态动词选择（中考高频考点） 一特殊疑问结构： *口Can/Could+主语+动词原形？（表推测时不用must提问） *→例句：Could this be Tom's notebook?(这可能是汤姆的笔记本吗？) *口Cn't+主语+动词原形？（表示惊讶或怀疑的否定疑问） *→例句：Can't she be at the library?(她难道不可能在图书馆吗) *口How can/could+主语+动词原形？（加强疑问语气） *→例句：How could you forget such an important thing?(你怎么可能忘记这么重要的事？) ·回答推测问句的注意事项（中考易错） -否定回答规范： *口对must问句的否定回答用can't/couldn't *→问句：Must they be in the classroom? *→答句：No,they can'tbe.I saw them in the playground.(不，不可能。我在操场看到他们了。) *口对can/could问句的肯定回答用may/might,,不用can/could *→▣句：Could he be the winner? *→答句：Yes,he might be.(是的，有可能是。) ·表推测时的程度修饰（中考拓展考点） 一可能性程度强化： *口must→可加副词强化确定性 *→例句：He must certainly be the best candidate.(他肯定是最佳人选。) *口might/could→可加possibly/perhaps降低确定性 *→例句：She might possibly know the answer..(她也许知道答案。) *口can't→可加absolutely/completely强化否定 *→例句：You can't absolutely be serious!(你绝对不可能是认真的！) ·特定语境下的推测转换（中考难点） 一时间状语缺失时的判断： *口通过上下文判断时间（无状语时优先判断为现在推测） *→例句：Her light is on.She must be at home.(灯亮着→现在推测) *口过去动作对现在的影响（现在完成时语境） *→例句：The ground is wet.It must have rained last night..(地湿了→过去推测) ·易混结构辨析（中考必考） -口mustn't与can't的区别： *mustn't表示”禁止”（不表推测），cant表示”不可能” *→对比：You mustn't smoke here.(禁止吸烟)That can't be true.(不可能是真的) -口coud表推测与表能力的区别： *→推测：She could be in the lab now.(可能在场) *→能力：She could swim at the age of five.(过去能力) 初三|英语引人教版 ENGLISH-初三全一册资料（人教版） 老法一：情态动词表推测的基本用法辨析 ·核心：根据语境判断推测的肯定/否定程度及可能性大小，选择must/might/could/can't ·真题1（单项选择）： -The girl in red_be Lucy.She has gone to Canada. A.must B.might C.can't D.could -答案：C解析：由"She has gone to Canada”可知，红衣女孩不可能是Lucy,表否定推测”不可能”用 can'to ·真题2（语法填空）： --Where is Tom? --Hebe in the library.I saw him reading there just now. -答案：must解析：由”saw him reading there just now”可知，对Tom现在的位置有极高可能性的肯定 推测，用must。 考法二：情态动词推测时态综合应用 ·核心：结合时间状语或上下文语境，判断对现在、过去或将来情况的推测，选择正确的情态动词及动词 形式 ·真题1（语法填空）： -The ground is all white.It _(snow)heavily last night. -答案：must have snowed解析：由时间标志词“last night'”可知是对过去情况的推测，肯定推测用 “must have+过去分词”，snow的过去分词为snowed。 ·真题2（单项选择）： --Where is Lucy?I can't find her. --She _in the library.I saw her go there just now. A.must be B.must have been C.might go D.can't be -答案：A解析：由上下文语境“just now(刚才去图书馆，现在可能还在)”及“can't find her”可知 是对现在情况的肯定推测，用“ust+动词原形”，be动词原形符合“在图书馆”的状态描述。 考法三：情态动词表推测的综合应用 ·核心：根据时间状语和语境判断推测类型，掌握不同情态动词表推测时的句式结构（原形完成式/进行 式/被动式)及程度差异 ·真题1（单项选择）： -The lights in Mr.Zhang's office are still on.He_working there now. A.must be B.can't be C.might be D.could be -答案：A解析：由"now”和"'lights are still on”可知为现在肯定推测，must表确定性最高的推测（肯定 正在)，其他选项可能性程度不符合语境暗示的确定性。 ·真题2（语法填空）： -Mary isn't answering the phone.She_(go)to the library with her classmates. -(提示：根据上下文逻辑选择合适的情态动词并变换形式) -答案：might/could have gone解析：由前句”现在不接电话”和后句”去图书馆”构成过去动作推测，且 无确定性时间标志，用might/coud降低确定性；结构为”情态动词+have+过去分词”，go的过去分 词为gone。 初三|英语|人教版 ENGLISH初三全一册资料（人教版） 解题小妙招 情态动词推测妙招 推测程度看语境，must肯定can't否； might could可能性，程度依次要记牢； 时态判断看时间，现在原形be doing; 过去完成have done,将来原形will do; 肯定推测must当先，否定推测can't占； 情态动词后接动原，完成结构have加done。 真题演练 演练一：单项选择（共10题） 1.The man _be our new teacher.He looks too young. A.must B.might C.can't D.could 2.Listen!Someone-singing in the next room.Who is it? A.must be B.can't be C.might not be D.must have been 3.Yoube quiet in the library.It's a rule here A.must B.can't C.might D.could 4.-Where is Lily? 5.-She _in the garden.I saw her watering flowers there just now. A.must be B.must have been C.might go D.can't be 6.The ground is dry.It-rained last night. A.must have B.can't have C.might have D.could have 7.-Could they_the meeting yesterday? 8.-No,they can't have.They were on a trip A.attend B.have attended C.be attending D.to attend 9.Your sister-like this song.She listens to it every day. A.must B.can't C.might not D.could 10.He_speak English when he was five,but now he can't. A.could B.must C.might D.can't 11.The door is locked.They_at home now. A.must be B.can't be C.might be D.could be 12.How_you say such a thing?I never told you that! A.must B.can C.might D.could 演练二：填空试题（共10题） 1.The book_belong to Tom.His name is on the cover.(must/might) 2.Shebe at school now.It's Sunday today.(can't/mustn't) 3.They-have finished their homework.The teacher collected it an hour ago.(must/might) 4.Listen!Someone_(sing)in the kitchen.Who is it? 5.The lights are off.He_(sleep)already. 6.You (not/come)to the party yesterday.I didn't see you. 7.This_(be)Mary's bag.Hers is red,but this one is blue. 8.He_(study)in the library now.I saw him go there ten minutes ago. 9.The room is empty.They_(leave)early this morning. 10.She_(not/know)the answer.She didn't listen to the teacher. 演练三：语法填空（共10空） It was a cold winter morning.The street was quiet,and most shops were closed.A woman walked by, looking worried.She kept checking her watch and sighing."Where is Tom?"she thought."He 1-(be) here by now.We planned to meet at 9 o'clock,and it's already 9:30." She remembered that Tom's phone was broken yesterday,so he 2(not/answer)calls.Maybe he 3_(miss)the bus?Or perhaps he 4_(forget)the time?She walked to the bus stop and waited. After 10 minutes,a bus arrived.Tom got off,running towards her."I'm sorry!"he said."My bike broke down on the way.I 5(repair)it for half an hour." The woman smiled."You 6_(tell)me earlier,but it's okay.Let's go." They went to a cafe.The waiter came over and asked,"7(can/you/order)now?"They looked at the menu."This cake 8(be)delicious,"said Tom."It's the cafe's special." After eating,they walked to the park.The sun came out,and children 9_(play)nearby."It 10-(rain)this afternoon,"said the woman,looking at the sky."The weather report said it would be sunny all day." Tom laughed."You never know!But let's enjoy the sunshine first." 答案 演练一：单项选择 1.C2.A3.A4.A5.B6.B7.A8.A9.B10.D 演练二：填空试题 1.must 2.can't 3.must 4.must be singing 5.must have slept 6.can't have come 7.can't be 8.must be studying 9.must have left 10.can't have known 演练三：语法填空 1.must be 2.couldn't answer 3.might have missed 4.might have forgotten 5.had to repair