"Maybe they have already been waiting for several days."

Translation: Forse aspettano già da diversi giorni.

[Bunny2013]

Why not "per" instead of "da"?

[peteraasch]

"Da" means "for" when you want to express a time which ocurred in the past and still continues on the present.

To put it simple:

Everytime you use the structure "for + something + time", you use "da" instead of "per".

We have been friends for seven years = Siamo amici da sette anni or Da sette anni siamo amici

[angie-p]

Maybe because the present perfect? I'm just guessing...

[KathyDent]

Sorry but I've been given 'stanno già aspettando' as the answer for this and there is NO WAY that this construction has been taught or even mentioned before. I am getting very frustrated by answers that are impossible to get right because they are far more complicated than anything that has been taught.

[illusio]

I agree. I had to translate this from English and have never seen a structure like this before.

[AmandaCecc]

I agree as well! So frustrating when you just have to guess

[ziggKogg]

So diversi can also mean several?

[RobBlaney]

Tricky - and annoying - on the multiple choice for the first time! :-(

[oktaya]

Maybe it just means "various" and it's used like that?? I am baffled too.

[ChristelDK]

As am I :-((

[casagialla]

Well that one caught me out!!

[Noell52]

I was surprised at this sentence too because it had not been taught thus far. Frustrating!