When there are two versions of something, ie - ddylen i ddim/na ddylen i, does it matter which you use when, or are they totally interchangeable?
Either one of these is fine - whichever gets to your tongue first! 
When there are two versions of something, ie - ddylen i ddim/na ddylen i, does it matter which you use when, or are they totally interchangeable?
Either one of these is fine - whichever gets to your tongue first!