"It is not about me."
Translation:Dyw e ddim amdana i.
yn is not required between dw i, etc and a preposition. It is needed to link to verb-nouns, adjectives and nouns:
- Mae Dewi'n nofio (swimming - verb-noun)
- Mae'r car yn goch (red - adjective)
- Dewi oedd yn athro, nid Siân (teacher - noun)
- Mae e ar fin mynd allan - He is just about to go out (ar - preposition)
- Dw i am fynd nawr - I want to go now (am - preposition)
That helps, diolch. But what is the linking yn, actually, a preposition? And one more question. I thought that it is usually conveyed by hi, or can it be both? Dyw hi ddym amdana i?
The word yn has a number of uses:
- As a preposition yn/ym/yng meaning in, at, etc - Dw i ym Mangor (I'm in Bangor); Maen nhw yn y swyddfa yng Nghaerdydd (They're in/at the office in Cardiff)
- To introduce a verb-noun following a bod verb, forming a periphrastic verb with a sense of being incomplete (the 'linking' yn)- Dyn ni'n bwyta (We're eating); Ro'n i'n gweithio (I was working, I used to work)
- To introduce a noun or adjective (as a predicate) - Rwyt ti'n oer (You're cold); Mae'r cŵn yn ddu (The dogs are black)
More examples and explanation here
See the table in the notes for the section 'Wanting2/3'. That shows the forms of statements, questions and negations to use in the present tense of bod (Dw i, Mae e, etc)
'It is not...' is a negative verb, and so we need the negative of Mae e...:
- Mae e... - It is...
- Dyw e ddim... - It is not...
- Dydy e ddim... - It is not... (another form)