* Indicating present time: "Estoy trabajando ahora." (I am working now.)
* Referring to the immediate future: "Voy a comer ahora." (I am going to eat now.)
* Expressing urgency: "¡Tienes que hacerlo ahora!" (You have to do it now!)
* In response to a question: "—¿Cuándo llegas? —Ahora." (—When do you arrive? —Now.)
"Ahora" is a very versatile word and its specific meaning can vary depending on the context.