"I cook the roast since yesterday."

[almondhoney]

Why is since "sin da" in this example, but "fin da" in "fin da oggi"?

[marziotta]

"sin" "sino" "fin" "fino" are perfect synonyms.

Please report if some of the forms are not accepted.

[robert0n]

Can anyone explain why it is "l'arrosto" and not "il arrosto"? I thought L and then apostrophe was a substitute for "la", and if arrosto is masculine... Any help much appreciated!

[arancia]

Technically it replaces "lo" since the word is masculine. I think most words beginning with a vowel, both masculine and feminine, use l' for the definite article.

[olefattguy]

Duolingo suggests as primary " Cucino l'arrosto da ieri."
Couldn't this also mean that you are heating up yesterday's roast?