Breakdown of Верни мне, пожалуйста, мой проездной, когда вернёшься домой.
Questions & Answers about Верни мне, пожалуйста, мой проездной, когда вернёшься домой.
There are two different reasons: 1) мне, пожалуйста, — пожалуйста is a parenthetical “polite insert” (like “please”), and it’s commonly set off by commas. 2) ..., когда вернёшься домой — the comma before когда marks the start of a subordinate time clause: “when you return home.”
верни is the informal singular imperative (“you, [do this]”) of the verb вернуть (perfective), meaning “return (something)” / “give back (something).”
If you were speaking formally or to more than one person, you’d use верните.
мне is dative case of я (“I/me”). With verbs like вернуть (“return / give back”), the person who receives something is often in the dative:
- Верни мне X = “Give X back to me.”