Welsh/Grammar/Verbs/Irregular

Mynd, Gwneud, Dod, and Cael all have irregular forms in their concise constructions. List below

Irregular Forms Table

	Mynd (to go)	Gwneud (to do, make)	Dod (to come)	Cael (to get)
Past Tense Concise
Fi	Es i	Gwnes i	Des i	Ces i
Ti	Est ti	Gwnest ti	Dest ti	Cest ti
Siân	Aeth Siân	Gwnaeth Siân	Daeth Siân	Cafodd Siân
Ni	Aethon ni	Gwnaethon ni	Daethon ni	Cawson ni
Chi	Aethoch chi	Gwnaethoch chi	Daethoch chi	Cawsoch chi
Nhw	Aethon nhw	Gwnaethon nhw	Daethon nhw	Cawson nhw
Future Tense Concise
Fi	A(f) i	(Gw)na(f) i	Do(f) i	Ca(f) i
Ti	Ei di	(Gw)nei di	Dei di	Cei di
Siân	Eith Siân / Â Siân	(Gw)neith Siân / (Gw)naiff Siân	Daw Siân	Ceith Siân
Ni	Awn ni	(Gw)nawn ni/newn ni	Down ni	Cawn ni
Chi	Ewch chi	(Gw)newch chi	Dewch chi	Cewch chi
Nhw	Ân nhw	(Gw)nân nhw	Dôn nhw	Cân nhw

Note that letters in brackets are added to make the verb formal. To not include them would mean the verb is said informally. Another way to make a negative verb is to put "Nid" before it, of which will require you to remove the "dim" that comes after the negative verb.

Note that when the verbs are negative, they undergo a soft mutation, excluding "cael" (to get), of which undergoes an aspirate mutation.

Note that when the verbs are asked as a question, they undergo a soft mutation.