
/ 让学习更有效 新课备课备考 | 英语学科 / 让学习更有效 新课备课备考 | 英语学科 2025年外研版九年级英语上册精讲精练 Module 4 Home alone 核心语法:情态动词表允许和许可 一、核心概念 情态动词 用来表示说话人的语气和态度。本单元重点学习用情态动词表达允许和许可,即在什么情况下可以做某事。 二、表示允许和许可的情态动词 情态动词 语气程度 使用场景 例句 can ★★★ (一般许可) 日常口语中最常用 You can use my pen. could ★★ (委婉请求) 礼貌地请求许可 Could I borrow your book may ★★★★ (正式许可) 正式场合,较礼貌 May I come in might ★★★★★ (非常正式) 非常正式和委婉的请求 Might I ask a question 三、详细用法解析 1、can 的用法 给予许可: You can go home now.(你现在可以回家了。) Students can use the library after school.(学生放学后可以使用图书馆。) 请求许可(口语常用): Can I open the window (我可以打开窗户吗?) 2、could 的用法 委婉请求(比can更礼貌): Could you help me with this (你能帮我一下吗?) Could I use your phone (我可以用一下你的电话吗?) 3、may 的用法 正式请求: May I have your attention, please (请大家注意一下。) May I suggest something (我可以提个建议吗?) 正式给予许可: You may begin the test now.(你们现在可以开始考试了。) 4、might 的用法 非常正式和委婉(现代英语中较少使用): Might I make a suggestion (我可以提个建议吗?) 四、否定形式:表示禁止 情态动词 否定形式 含义 例句 can cannot/can't 不允许,禁止 You can't smoke here. may may not 不允许(较正式) Students may not leave early. 五、易错点分析 1、can 与 may 的混淆 Can I have your name (在正式场合不够礼貌) May I have your name (正式场合更合适) 2、否定形式使用错误 You may not to smoke here. You may not smoke here. 3、回答方式错误 — Can I go — Yes, you can go. — Can I go — Yes, you can. 六、记忆口诀 "请求许可表允许,情态动词来帮你。 can 常用表许可,could 委婉更客气。 may 正式有礼貌,might 现在很少用。 否定形式表禁止,can't may not 要记清。 根据场合选用语,礼貌沟通没问题!" 1.My father never allows me _____ out alone at night. A.going B.to go C.not to go 2.My parents don’t allow me _____ out with my friends on school nights. A.go B.going C.to go 3.—Tom, don’t forget to remind your brother _____ his homework today. —I will, Mom. But I think we should allow him _____ his favorite TV show first. A.to do; to watch B.doing; to watch C.to do; watching D.doing; watching 4.My parents don’t allow me _____ out at night. A.go B.to go C.going D.goes 5.The telephone allows people to talk to each other over long _____. A.times B.distances C.heights D.widths 6.The Internet allows us _____ with people from all over the world. A.communicate B.communicating C.to communicate D.communicated 7.—_____ I take photos here —Sorry, you can’t. It’s not allowed in the museum. A.Must B.Need C.Can D.Will 8.—Why can’t I say what I want to say —Please be patient. Only one of the students _____ to speak at a time. A.allows B.allowed C.is allowed D.are allowed 9.—The new smart phone-boxes in Shanghai allow people to make calls without money. —Yo ... ...
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