既 (jì) can be used in conjunction with either 又 (yòu) or 也 (yě)
to express that something is "both A and B":
Used with 又
Structure
A and B can be adjectives, verbs or short phrases. Most of the
time A and B will take the same form i.e. if A is an adjective B
will also be an adjective.
Examples
- 他 做 事情 既 快 又 好。He does
things both quickly and well.
- 这 家 银行 的 服务既 热情 又周到。This
bank's service is both enthusiastic and thorough.
- 这个 产品 的 设计 既 时尚 又 人性化。This product's design is both stylish and
humane.
Used with 也
Structure
The structure can also be formed with 也, but here it is used
primarily for verbs or verb phrases:
既 + [Verb Phrase] ，也 + [Verb Phrase]
Examples
- 她 既 是 我 妈妈 ，也 是 我 朋友。She
is both my mother and my friend.
- 要求 是 你 既 要 会 说 流利 的 中文 ，也 要 会 说 流利 的 英文
。The requirement is that you need to speak both
fluent Chinese and English.
- 爸爸 很 生 气 我 的 气 ，不过 他 既 没 打 我 ，也 没 骂 我
。My father was really mad at me, but he neither
hit me nor scold me.
See also
Sources and further
reading
Books
Category:B2 grammar points