Note Welsh for the verb form has or have been - wedi bod
Dw i wedi bod - I have been Rwyt ti wedi bod - You've been Mae e/o wedi bod - He's been Mae hi wedi bod - She's been Rydyn ni wedi bod - We've been Rydych chi wedi bod - You've been Maen nhw wedi bod - They've been
Wedi bod is followed by 'yn' and a verb noun, for example
Jenny says 'Wyt ti'n meddwl bod Brian wedi bod yn cael affêr?' -Do you think Brian's been having an affair?
You would expect the answer to the question form Wyt ti wedi? to be Ydw or Nac ydw. For example - Wyt wedi cael cinio? - Ydw or Nac ydw
However don't be surprised if you hear some people responding with the answer 'Do' or 'Naddo'. This is quite common in colloquial Welsh.
Wyt ti wedi gorffen? - Do
Wyt ti wedi bod? - Naddo
Dod â/Mynd â
Dod and mynd are two very common verbs - Dod - to come - Mynd - to go
However when they are followed by 'â' they take different meanings
'Mynd â' means 'to take' - to take someone or something somewhere
Dw i'n mynd â'r car i'r garej - I'm taking the car to the garage
'Dod â' means 'to bring'
Tyrd â'r papur yna yma - Bring that paper here.
Comparison of Adjectives - Da/Drwg
Da and drwg are very common adjectives. However in their comparative forms they are irregular
Cystal - as good as or so good Dydy e ddim cystal - He's not so good Dydy e ddim cystal â'i frawd - He's not as good as his brother Gwell - better Wyt ti'n well? - Are you better?
Gorau - The best
Hi yw'r gorau - She's the best
Note that gorau is used in an emphatic sentence
Drwg - bad Cynddrwg or Mor ddrwg - As bad as or so bad Doedden nhw ddim cynddrwg â hynny - They weren't as bad as that Mae e/o mor dddrwg - He's so bad Gwaeth- worse Mae e'n waeth - He's worse Gwaetha - The worst Nhw yw'r gwaetha - They're the worst