情态动词 can may must should-2025-2026学年七年级英语下册语法易错点精讲（北师大版）

初中北师大版 【寒假专版】 7年级下册语法精讲 寒假专版 情态动词canl/may/must/should专项训练 寒假语法易错点精讲 学段：初中 教材：北师大版年级：7年级下册 语法认知 情态动词can/may/must/.should是表示说话人语气或态度的动词，不能单独作谓语，需和动词原形 一起使用，在句中可表示能力、许可、必须、义务等。 易错点讲解 易错点一：情态动词can/may的用法混淆 讲解： can表示“能力”或“许可”，may主要表示“许可”或“可能性”。在请求许可时，may比can更 正式；表示能力时只能用can。 例句：I can speak English.(能力)一May I come in?-Yes,you may.(许可) 真题再现： 1.(2024北京海淀期中，北师大版)一一you swim across the river?—No,Ican’t. A Can B May C Must D Should 答案：A解析：根据答句“can’t”可知问句询问能力，用can。 2.(2024 陕西西安月考，北师大版)一一I use your dictionary?Sure,here you are.. A Can B Must C Should D Need 答案：A解析：请求许可时can和may均可，此处选项中无may,用can符合口语习惯。 易错点二：must与have to的用法混淆 初中北师大版 【寒假专版】 7年级下册语法精讲 讲解： must表示主观上“必须”，have to表示客观上“不得不”。must的否定式是mustn't(禁止)，have to的否定式是don'thave to(不必)。 例句：I must study hard.(主观)It'sraining,so I have to stay at home..(客观) 真题再现： 1.(2023广东深圳期末，北师大版)You一play with fire.It's dangerous, A mustn't B don't have to C shouldn'tD needn't 答案：A解析：表示“禁止”用mustn’t,符合“玩火危险”的语境。 2.(2023四川成都期中，北师大版)My bike is broken,soI一walk to school today A must B have to Cmay D can 答案：B解析：“自行车坏了”是客观原因，用have to表示“不得不”。 易错点三：should与must的语气混淆 讲解： should表示“应该”，语气较委婉，强调建议；ust表示“必须”，语气强硬，强调义务或命令。 例句：You should brush your teeth twice a day..(建议)You must follow the rules..(命令) 真题再现： 1.(2024浙江杭州月考，北师大版)-What一I do to improve my English?一You should read more English books A must B should C can D may 答案：B解析：根据答句“should”可知问句询问建议，用should。 2.(2024江苏南京期中，北师大版)Students一arrive on time for class.It'sthe school rule. A should B must C may D can 答案：B解析：“学校规定”是必须遵守的义务，用ust语气更强。 易错点四：情态动词后的动词形式错误 讲解： 情态动词can/may/must/.should后必须接动词原形，不能接不定式或动名词。 例句：He can play basketball.(正确)He can to play basketball.(错误) 初中北师大版 【寒假专版】 7年级下册语法精讲 真题再现： 1.(2023湖北武汉期末，北师大版)You should.一more exercise to keep healthy.. A take B takes C taking D to take 答案：A解析：should后接动词原形，take符合语法规则。 2.(2023湖南长沙期中，北师大版)一Can you一me with my homework?一Of course. A help B helps C helping D to help 答案：A解析：can后接动词原形，help为正确形式。 易错点五：情态动词否定式的缩写错误 讲解： can的否定式是can't,must的否定式是mustn’t,should的否定式是shouldn't,may的否定式 常用may not(较少缩写)。 例句：You can't park here.He mustn't smoke. 真题再现： 1.(2024安徽合肥月考，北师大版)You一talk loudly in the library.It'simpolite A can't B mustn't C shouldn't Dmay not 答案：B解析：图书馆禁止大声说话，用mustn't表示“禁止”。 2.(2024山东济南期中，北师大版)Should I tell him the truth?-No,you一.He will be sad A shouldn't B mustn't C can't D needn't 答案：A解析：should的否定回答用shouldn't,表示“不应该”。 易错点综合演练 综合演练 I单项选择（直击易错点) 1.一_you finish the homework in half an hour?—No,Ican't.(易错点一) A Can B May C Must D Should 2.You_wear a seat belt when driving.It's the law.(易错点二) A must B have to C may D can 3.-What一I do if I lose my ID card?一You should report to the teacher at once.(易错点三) A must B should C can D may 3 初中北师大版 【寒假专版】 7年级下册语法精讲 4.We一speak loudly in the reading room.(易错点五) A can't B mustn't C shouldn't D needn't Ⅱ.用所给词的适当形式填空（强化易错点区分） l.She_(can)swim fast when she was five.(易错点一) 2.The students_have to)clean the classroom every Friday.(易错点二) 3.You_(should)be quiet in the hospital.（易错点三) 4.They一(must not)play computer games for too long.（易错点五) Ⅱ.短文填空（综合运用四大易错点） 用适当的情态动词填空，使短文完整通顺： Hello,I'm Lily.I 1.(can/may)play the piano very well.Mymother saysI2.-(must/have to)practice it every day because I want to be a musician.But sometimes I 3.-(have to/must)do my homework first.My teacher often tells us,"You 4.(should/must)study hard,but you 5.(mustn't/can't)forget to exercise.” V.连词成句（聚焦易错句式） 1.can,swim,who,fast,very,(?)(易错点一) 2.I,to,school,today,walk,have,()(易错点二) 3.should,what,do,I,party,for,,the,(?)(易错点三) 4.in,we,mustn't,library,talk,loudly,the,()(易错点五) 参考答案 I单项选择 1.A2.A3B4B Ⅱ.用所给词的适当形式填空 1.could 2.have to 3.should 4.mustn't I.短文填空 1.can 2.must 3.have to 4.should 5.mustn't 初中北师大版 【寒假专版】7年级下册语法精讲 V.连词成句 1.Who can swim very fast? 2.I have to walk to school today. 3.What should I do for the party? 4.We mustn't talk loudly in the library. 5