Questions & Answers about Cậu cắt hành nhé.
In this sentence, cậu means you.
It is an informal personal pronoun, usually used:
- between friends
- between people of similar age
- in a casual, familiar setting
So Cậu cắt hành nhé. is something like telling a friend, classmate, sibling, or someone you are close to: You cut the onion, okay?
A useful warning: cậu can also mean maternal uncle in other contexts, but here it is clearly a pronoun meaning you.
Both cậu and bạn can mean you, but they feel a little different.
- bạn is often more neutral and widely usable
- cậu feels more familiar, friendly, and casual
- cậu is especially common in some speech styles, especially in the North
So using cậu here suggests the speaker and listener have some closeness. If you changed it to Bạn cắt hành nhé., it would still be understandable, but the tone would shift slightly.