情态动词系统复习-2025-2026学年九年级英语下册语法重难点精讲（译林版）

9年级译林版 【寒假专版】 D版重难点精讲 寒假专版 【语法专题】情态动词系统复习 初中译林版9年级 语法精讲 语法概述：情态动词(can,could,may,might,must,need,should,wiL,would)=表示说话人对动作 或状态的看法、态度或推测的词，在句中不能单独作谓语，需和动词原形一起构成谓语，没有人 称和数的变化。 一、重难点讲解 重难点一：情态动词can/could/may/might的用法区别讲解： -can:表示“能力”或“许可”，口语中可表请求，否定形式为can’t(不可能，语气较强)。 She can speak three languages.(能力) Can I borrow your pen?(请求许可) -cold:can的过去式表过去能力：也可表委婉请求（回答用can)或推测（可能性低于may)。 I could swim when I was five.(过去能力) Could you please open the window?(委婉请求) may: 表“许可”（较正式）或“推测”（可能，用于肯定句），否定用may not(不允许)。 You may leave the room now.(许可) He may come to the party tonight.(推测) -might:may的过去式或更委婉形式，推测时可能性低于may。 She might arrive late due to the traffic.(可能性较低的推测) 真题再现： 1.(2024江苏南京期中，译林版)一_I use your dictionary?I left mine at home. -Of course you A.Must;could B.Could;can C.May,must D.Can;might 答案：B解析：第一空表委婉请求用could,第二空回答许可用can。 1 9年级译林版 【寒假专版】 D版重难点精讲 2.(2023 江苏苏州月考，译林版)The light in his room is off.He_be at home A.nustn’t B.can't C.may not D.needn't 答案：B解析：根据“灯关了”推测“不可能在家”，用can’t表否定推测。 重难点二：must/have to/should的用法区别讲解： must:表“主观必须”（强调说话人意志），否定mustn’t(禁止)，疑问用needn’t回答。 You must finish your homework before dinner.(主观要求) -Must I hand in the report today?-No,you needn't. -have to:表“客观需要”（因外界因素），有人称和时态变化，否定don’thave to(不必)。 She has to take care of her sick mother..(客观原因) -should:表“建议/义务”（应该)，否定shouldn’t(不应该)，语气较委婉。 You should apologize for your mistake.(建议) 真题再现： l.(2024江苏无锡期末，译林版)We wear masks in crowded places to keep safe,according to the doctor. A.must B.could C.would D.might 答案：A解析：根据医生建议，表“必须”戴口罩，用ust。 2.(2023江苏常州期中，译林版)一Do you_to go to the supermarket now? -No,but I go later because we need some milk. A.must;have to B.have to;must C.need;should D.have to;should 答案：B解析：第一空表“客观需要”用have to:第二空表“主观必须”用must。 重难点三：情态动词表推测的用法讲解： -肯定推测：must(一定，可能性极高)>may/might/could(可能，依次递减)。 He must be in the library-he always studies there.(must表肯定推测) This book may be Lucy's;her name is on it.(may表可能) 2 9年级译林版 【寒假专版】 D版重难点精讲 -否定推测：can’t(不可能)>may not(可能不)。 It can't be a real diamond一it's too cheap.(can’t表否定推测) She may not attend the meeting,she's busy today.(may not表“可能不”) -疑问推测：用ca/could(可能吗？)，不用may/might。. Could this be the right answer?(疑间推测) 真题再现： 1.(2024江苏扬州期末，译林版)-Who is knocking at the door? -It be Tom.He promised to come at 7 pm. A.must B.can C.might D.should 答案：A 解析：根据“承诺7点来”推测“一定是汤姆”，用ust表肯定推测。 2.（2023江苏南通月考，译林版)一Is that.Smith? -It be him.He has gone to Beijing on business. A.must B.can't C.may D.should 答案：B 解析：根据“去北京出差”推测“不可能是他”，用can’t表否定推测。 重难点四：情态动词的被动语态讲解： 结构：情态动词+be+动词过去分词 The work must be finished by Friday.(must be done) Your homework should be checked carefully.(should be checked) 真题再现： l.(2024江苏徐州期中，译林版)These old books_wel.They are important for students. A.must keep B.must be kept C.have to keep D.should keep 答案：B解析：books与keep是被动关系，用“情态动词+be+过去分词”，选must be kept。. 2.(2023江苏盐城期末，译林版)The problem_discussed at the meeting tomorrow,according to the plan 3 9年级译林版 【寒假专版】 D版重难点精讲 A.can be B.mustn't be C.should be D.needn't be 答案：C解析：根据“计划”表“应该被讨论”，用should be discussed。 易错点综合演练 L单项选择（直击重难点） 1.-I borrow your English notebook?I missed the class yesterday. A.Must B.Could C.Should D.Need 2.The sports meeting be held next Monday because of the heavy rain A.can’t B.mustn't C.needn't D.shouldn’t 3.You wear a helmet when riding an electric bike.It's the new traffic rule. A.can B.may C.must D.might 4.-Must I return the book to the library today? -No,you.You can keep it for another three days. A.mustn't B.can’t C.needn't D.shouldn't Ⅱ.用所给词的适当形式填空（强化句型结构） 1.This task(finish)before5o'clock this afternoon.(用must的被动语态) 2.She_(not go)to school yesterday because she was ill.(用have to的适当形式) 3.You_be)careful when crossing the road..(用should的适当形式) 4.The movie(begin)at7:00p.m.We'd better hurry up..(用may表推测) 4 9年级译林版 【寒假专版】 D版重难点精讲 Ⅲ.短文填空（综合运用情态动词） 用can,could,may,must,should的适当形式填空，使短文完整通顺。 Tom:Mom,I go to the park with my friends this afternoon? Mom:I'm afraid you not.You have a fever.Youstay in bed and rest. Tom:But I promised Mike to help him with his math homework. Mom:You call him and explain.He understand.And you take the medicine on time. Tom:OK,Mom.I do as you say. V.按要求改写句子（巩固情态动词用法） 1.He must finish his homework now.(改为被动语态) 2.You may park your car here.(改为否定句) 3.一Must she leave now?(作否定▣答) 4.The story can be true.(改为一般疑问句) 参考答案 I.单项选择：1B2.A3.C4.C Ⅱ.用所给词的适当形式填空：1.must be finished2.didn't have to go3.should be4.may begin Ⅲ短文填空： 1.may 2.can 3.must 4.should 5.may 6.must 7.will V.按要求改写句子： 1.His homework must be finished now. 2.You may not park your car here. 3.No,she needn't. 4.Can the story be true? 5