Can I train Nani to be a wing back?

Firstly sorry for my bad English.
I just want to change my formation to 5-3-2 in Man Utd. But need to train some players for new position. I have got Nani and Zaha who have no place.
Zaha can be played as a striker and I'm training him to be one.
But for Nani, I don't want to waste his dribbling attribute and play as an AM. I want to ask if he can be train to be a right wing back. Thx!

I wouldn't even think about it to be honest. Nani is a very limited player and having him as a wing back could cost you a lot as he is not a good defensive player at all.

But if i don't need him to do much defending?

Sell him on and get someone meant for that position he's not going to take well. If you try and succeed though good onto you that would be cool.

hed be better off as a free aqent