If you finish early you can go home. She can come whenever she likes, as far as I'm concerned. Finish up your dinner and you can have dessert. How early can you get off this afternoon? Anyone can go - you don't have to be invited. Loosely managed teams can become hotbeds of distraction—employees routinely complain that they can't get their work done because they are forced to spend too much time in meetings or compelled to work in noisy offices. 1. CAN总线历史 CAN 是 Controller Area Network 的缩写（以下称为 CAN），是 ISO国际标准化的 串行通信协议。 在当前的汽车产业中，出于对安全性、舒适性、方便性、低公害、低成本的要求，各种各样的电子控制系统被开发了出来。 Can is usually used in standard spoken English when asking for permission. It is acceptable in most forms of written English, although in very formal writing, such as official instructions, may is often used instead: Persons under 14 unaccompanied by an adult may not enter. can 和 can’t 是最常见的情态动词，用来表达能力、许可与可能性。 本篇详细说明句型结构、否定与疑问形式、常见错误与实用例句，并附练习题，帮助你完整掌握 can 的用法。 情态动词 “can” 的三种用法 1 We can use can to talk about ability. 用 “can” 表 “能力”。 I can play the guitar I can speak Spanish, but I can’t fly. 2 We can use can to ask for or give permission to do something. 用 “can” 表 “请求或给予许可”。 Can I open the window, Elly? No, you can’t! It’s too cold! The use of can to ask or grant permission has been common since the 19th century and is well established, although some feel may is more appropriate in formal contexts. May is relatively rare in negative constructions (mayn't is not common); cannot and can't are usual in such contexts. Can是英语中的多功能词汇，具有情态动词与名词双重词性，发音为英 [kæn; kən]、美 [kæn; kən]。 其词源可追溯至古英语“cunnan”，原意为“知道、有能力”。 Canva is a free-to-use online graphic design tool. Use it to create social media posts, presentations, posters, videos, logos and more.