情态动词may might could表示可能性的用法-2025-2026学年七年级英语下册语法重难点精讲（教科版五四制）

7下外研版 【寒假专版】 D版重难点精讲 寒假专版 【语法专题】情态动词may,might,.could 表示可能性专项突破 初中外研版七年级下册 语法精讲 语法概述：情态动词may might could表示“可能性”的用法=may might could表示事情发生的可 能性，在句中可用于陈述句和疑问句。 一、 重难点讲解 重难点-：nay,might,.could表示可能性的程度差异讲解： may表示“可能”，可能性中等，常用于肯定句或否定句(may not);might可能性比may更低， 可用于肯定句、否定句(might not):could表示“可能”时与might程度相近，语气更委婉。三者 均后接动词原形，否定形式直接在后面加not(may not/might not/.could not)。 It may rain this afternoon,so take an umbrella.(可能会下雨，中等可能性) She might come to the party,butI'm not sure.(可能性较低，不确定) This could be the right answer,.but let's check again.(委婉推测，可能性与might相近) 真题再现： 1.(2024·山东烟台期中，外研版)Where is Tom? -He be in the library.I saw him there just now. A.may B.must C.need D.can 答案：A解析：根据“just now”(刚才看到)推测可能性，用may表示“可能”，符合语境。 2.(2023·河北石家庄月考，外研版)You not play football in the street..It's dangerous.. A.might B.may C.could D.must 答案：B解析：否定句中表示“不可以”（可能性的否定），用may not,.语气比must not委 7下外研版 【寒假专版】 D版重难点精讲 婉，符合“提醒危险”的语境。 重难点二：nay,might,.could表示可能性的句式用法讲解： 1.肯定句：主语+may/might/could+动词原形 She may go shopping with her mother tomorrow. 2.否定句：主语+may not/might not/could not+动词原形（注意：may not表示“可能不”，might not/could not表示“可能不/不可能”，语气更弱) He might not attend the meeting because he is ill 3.疑问句：一般不用may/might表示可能性的疑问（常用could或can),could用于疑问句时表示 委婉请求或推测 Could this red bag be yours?(委婉推测) 真题再现： 1.(2024·辽宁沈阳期末，外研版)一Is Lucy at home? -I'm not sure.She be out for a walk. A.must B.may C.should D.need 答案：B解析：根据“not sure”(不确定)推测可能性，用may表示“可能”，符合语境。 2.(2023·山东威海期中，外研版)The story be true,.but nobody can prove it.. A.might not B.maynot C.could D.must 答案：C 解析：肯定句中表示“可能真实”，用could符合“无人证明”的不确定语境，语 气委婉。 重难点三：nay与might/could的时态与语境差异讲解： 1. may通常用于现在或将来的可能性：might/could可用于过去的可能性（与完成时连用： might/could have+过去分词)，表示“过去可能做了某事” She might have missed the bus,so she was late.(过去可能错过公交车) 2.语境上，might/could比may更委婉、不确定，常用于建议、推测或虚拟语气：may语气稍肯定， 也可用于请求许可（但表示“可能性”时不表许可） You could try calling her again-一maybe she didn't hear the phone.(委婉建议，暗含可能性) 真题再现： 1.(2024·天津河西区月考，外研版)Why didn't Peter come to the party last night? 2 7下外研版 【寒假专版】 D版重难点精讲 -He have forgotten the time A.may B.might C.must D.should 答案：B解析：表示过去的可能性推测，用might have+过去分词，符合“昨晚没参加派对， 可能忘记时间”的语境。 2.(2023·山西太原期末，外研版)一_I borrow your dictionary? -Sure,here you are. A.May B.Must C.Should D.Need 答案：A解析：此处may表示“请求许可”，但需注意：题目选项中若考查“可能性”，may 不表许可，本题实际为干扰项，但结合外研版教材，需区分“可能性”与“许可”的用法（此 处重点为可能性，许可用法仅作对比)。 易错点综合演练 I单项选择（直击重难点） 1.-Where is Amy?I can't find her. -She be in the music room.She likes singing after class. A.may B.must C.should D.need 2.-Is this your brother's wallet? -I'm not sure.He have left it here,but he usually keeps it in his bag. A.must B.might C.should D.will 3.You not swim in this river.It's very deep and dangerous. A.might B.may C.could D.must 3 7下外研版 【寒假专版】 D版重难点精讲 4.-the red sweater be Lisa's? -Yes,it looks like hers.She often wears red clothes. A.Must B.May C.Could D.Should Ⅱ.用所给词的适当形式填空（强化句型结构） 1.The weather report says it(not rain)tomorrow,so we can go hiking. 2.My brother(might not join)us for dinner tonight because he has a football match. 3.(could)you please check if the library(open)at 9 a.m.tomorrow? 4.She(may finish)her homework before 8 p.m.,but I'm not certain 血.短文填空（综合运用情态动词） 用may,might,could的适当形式填空，使短文完整通顺。（教材情境改编） Tom and his friends are planning a weekend trip."Wego to the mountains,"Tom says."But it rain on Sunday,so we need to check the weather first.Lily adds,"I not join you because my mom wants me to visit my grandparents.But if they agree,I come with you on Saturday!" V.按要求改写句子（巩固否定、疑问句式） l.He may go to the park with his friends this afternoon.(改为否定句) 2.The story could be true according to the news.(改为一般疑问句) 3.She might not attend the party because she is busy.(对划线部分提间) 参考答案 I.单项选择：1.A2.B3.B4.C Ⅱ.用所给词的适当形式填空： 1.may not rain 2.might not join 3.Could;may open 4.may finish 4 7下外研版 【寒假专版】 D版重难点精讲 Ⅲ.短文填空： 1.may/might/could 2.might/could 3.may/might 4.may/might/could V.按要求改写句子： 1.He may not go to the park with his friends this afternoon 2.Could the story be true according to the news? 3.Why might she not attend the party? 5