Hello:
* Hola: (pronounced "oh-la") This is the most common and casual greeting.
* Buenos días: (pronounced "bway-nos dee-as") Good morning. Used from sunrise to midday.
* Buenas tardes: (pronounced "bway-nas tar-des") Good afternoon. Used from midday to sunset.
* Buenas noches: (pronounced "bway-nas noh-chays") Good evening/good night. Used from sunset to sunrise.
Goodbye:
* Adiós: (pronounced "ah-dee-os") This is the most common and casual farewell.
* Hasta luego: (pronounced "as-ta lway-go") See you later.
* Hasta mañana: (pronounced "as-ta ma-nya-na") See you tomorrow.
* Chau: (pronounced "chow") This is a very informal and widely used goodbye.
Tips:
* Formal vs. informal: "Hola" and "Chau" are informal greetings. Use "Buenos días," "Buenas tardes," and "Buenas noches" for more formal situations.
* Context matters: Adjust your greeting based on the situation and the person you're speaking to.
* "Vos" vs. "Usted": In Argentina, the informal "vos" is commonly used in everyday speech, while "usted" is more formal.
Bonus:
* ¡Qué tal! (pronounced "keh tal") A friendly way to say "how are you?"
* ¿Cómo estás? (pronounced "koh-moh eh-stahs") A more formal way to ask "how are you?"
Remember, the best way to learn is to practice!