以及 (as well as)

• Pinyin: yǐjí
• Formation: Noun Phrase 1，Noun Phrase 2 + 以及 + Noun Phrase 3
• Hanzi breakdown: 以 = a person (人) using a tool — 'by means of'; 及 = a hand (又) reaching a person (人) — 'to reach, and'

Meaning

以及 (yǐjí) means 'as well as,' 'along with,' or 'and.' It is a formal conjunction used to connect noun phrases, typically adding the final item in a list or joining two closely related but distinct categories.

以及 is more formal than 和 or 跟 and is predominantly found in written Chinese, news reports, academic papers, and official documents. It often introduces the last element in an enumeration, similar to how English uses 'as well as' to add a final related item. Unlike 和 which simply connects two equal items, 以及 can imply that the items before it form one group and the item after it is an additional related category. It is rarely used in casual conversation. In formal lists, 以及 typically replaces the last 和 to create a more structured, polished feel. It cannot connect verbs or adjectives directly — it is primarily used with noun phrases or clauses functioning as nouns.

Examples

1. 这个项目涉及市场营销、产品设计以及用户体验。 This project involves marketing, product design, as well as user experience.
2. 公司提供住房补贴、交通补贴以及年终奖金。 The company provides housing subsidies, transportation allowances, as well as year-end bonuses.
3. 他的研究领域包括人工智能、大数据以及云计算。 His research areas include artificial intelligence, big data, as well as cloud computing.

Usage Guide

Context: written, formal, academic

Tone: enumerative

Do Say

• 这次会议讨论了预算分配、人员调整以及未来发展方向。
• 申请材料包括个人简历、推荐信以及学历证明。
• 博物馆展出了书法作品、水墨画以及陶瓷器皿。
• 政策涵盖了教育、医疗以及社会保障等方面。

Don't Say

• 我今天吃了苹果以及喝了牛奶。(以及 connects noun phrases, not verb phrases — restructure as noun list or use 并 for verbs) → 我今天吃了苹果，还喝了牛奶。
• 她以及我去了公园。(以及 is too formal and heavy for connecting two pronouns in casual speech — use 和 or 跟 instead) → 她和我去了公园。

Origin & History

以 means 'by means of' or 'with' and 及 means 'to reach' or 'and.' Together, 以及 literally suggests 'and reaching to' — extending the list to include additional items. It has been a formal connective since classical Chinese.

Cultural Context

Generation: All ages

Social background: Universal