Learn Italian: Il treno arriva fra cinque minuti. - The train arrives in five minutes.

When talking about a point in the future (like "in five minutes from now"), Italian uses fra or tra. If you used in cinque minuti, it would mean the train takes exactly five minutes to complete its journey, rather than arriving five minutes from this current moment.

Can I use tra instead of fra in this sentence?

Yes! Fra and tra are completely interchangeable and mean the exact same thing. Italians usually choose between them just to make the sentence sound better and avoid repeating sounds. For example, to avoid the repeated "tr" sound in tra tre minuti, they will say fra tre minuti.

Why is the present tense arriva used if the train is arriving in the future?

Just like in English ("The train arrives in five minutes"), Italian frequently uses the present tense for scheduled events or things happening in the near future. You could use the future tense (arriverà), but arriva is very common and completely natural here.

How does fra in this sentence contrast with da from this lesson?

Fra (or tra) looks forward to a future moment: the train arrives in five minutes. If you wanted to talk about an action that started in the past and is still ongoing—like waiting for five minutes—you would use da: Aspetto il treno da cinque minuti (I have been waiting for the train for five minutes).