Yo is a short shout you use to say hello, to make someone look at you, or to answer when someone calls your name — like saying "here" when the teacher reads the list. It is very casual and very spoken.

Yo是 to say hello用來打招呼、 to make someone look at you讓別人看向你、 or to answer或用來應聲 when someone calls your name在有人叫你名字時 a short shout的一聲短喊 — like就像 when the teacher reads the list老師點名時 saying "here"喊「有」。 It它 is very casual非常隨性、 and very spoken也非常口語。

It sounds young, and it sounds American; it came into wide use through Black American English and hip-hop, and now young people all over the world say it, often half joking.

It它 sounds young聽起來年輕， and sounds American也聽起來很美式； it它 through Black American English and hip-hop經由美國黑人英語和嘻哈 came into wide use流行開來， and now現在 all over the world全世界的 young people年輕人 say it都在說， often half joking常常半開玩笑。

Between friends it is warm and friendly: "Yo, wait for me." To a stranger, a boss, or a teacher, it can sound rude, so it stays inside friendships. People also use it in the middle of talking to grab attention or to mark that something surprising is coming: "Yo, that was crazy." You write it in messages all the time; you do not write it in school work or an email to a company.

Between friends朋友之間 it它 is warm and friendly是溫暖友善的： "Yo, wait for me."「喲，等等我。」 To a stranger, a boss, or a teacher對陌生人、老闆或老師， it它 can sound rude可能聽起來沒禮貌， so所以 it它 stays inside friendships只留在朋友圈裡。 People人們 also也會 in the middle of talking在講話講到一半時 use it用它 to grab attention來抓住注意力， or to mark或標記 that something surprising is coming有讓人吃驚的事要來了： "Yo, that was crazy."「喲，那太扯了。」 You你 in messages在訊息裡 write it all the time隨時都在寫它； in school work在學校作業 or an email to a company或給公司的電子郵件裡 you do not write it就不寫。

There is a second, separate use: in some casual American speech yo can stand in for your, as in "yo car" — that one is even more informal and is tied to particular ways of speaking, not something students should copy.

There is有 a second, separate use第二個、分開的用法： in some casual American speech在某些隨性的美式口語裡 yo can stand in for可以代替 your， as in "yo car"像 "yo car" 那樣 — that one那一個 is even more informal更加不正式， and is tied to綁在 particular ways of speaking特定的說話方式上， not something students should copy不是學生該模仿的東西。