preposition, pronoun, verb · preposition used to indicate the person or object for whom or on whose behalf an action is performed, or to whom the responsibility pertains.

你应该为自己的未来负责。

preposition, noun, verb, time word, pronoun, particle, numeral · for the sake of; on behalf of; intended for or directed toward a recipient

这是我为你准备的礼物。

verb, noun, preposition, pronoun · to serve in a specific capacity, behave as, or be

选他为代表。

preposition, verb · on account of; due to; as a result of a specific reason or cause

他为这件事感到很伤心。

verb, expression, numeral · to take or consider something as

以此为准。

noun, verb, expression, numeral · to change or turn into

变废为宝。

verb, punctuation, numeral, preposition · to be; to equal (used in formal or mathematical contexts to link a subject and its predicate or value).

一加一为二。

punctuation, verb, preposition · to do, act, or perform

事在人为。

preposition · marker used to indicate the passive voice

为人所笑。