Sometimes, the "would" appears together with an if-clause, in which case a {da'i} isn't always needed:
mi va'o lo nu [da'i] mi jipci cu na kuckla lo dargu
If I was a chicken, I wouldn't cross the road.
Here the {da'i} is not strictly needed, because the event tagged by va'o is not claimed by the speaker. The {da'i} can be used to add emphasis on the non-factualness of the sentence, however.