"May I walk? Yes."

Translation: Ga i gerdded? Cei.

[katmaloo]

Why is it cei and not ydy?

[EllisVaughan]

Ydy is used to answer "Ydy" questions e.g "Ydy hi'n cerdded? Ydy", whereas this is a question that is using the verb "cael" which is answered with "cei"

[katmaloo]

Thanks!

[Kyle462331]

Is there any lesson on where/when these mutations occur? Why does cerdded become gerdded?

[ibisc]

There are many reasons for a soft mutation. The ones that come up on this course are each explained in the 'Hints and Tips' for the section where each one comes up for the first time - see https://www.duolingo.com/comment/17638579

In this particular case, it is because cerdded is the object of the short-form verb ga ...?.

[Peri_Ysanne]

Its such a huge shame the hints and tips are only available on the web version, not the app, it puts me off using the app as its such a massive disadvantage

[DAVIDTHOMA587939]

Does Ga i also mean Can I ? Also, Cei surely means Yes, you may, or Yes,you can. If Ga i is Can I, what is I can, or I may /

[GaynorBuss]

Could you say gallwch instead of Cei?

[ibisc]

No. Gallwch is a form of gallu, not cael.

[Barb1468]

Would 'ydw' instead of 'cei' work as well? (If not, why?)
Thanks for any help or hints! ;-)

[ibisc]

Which Yes/No responses are used depend on how the question is asked. The course notes are there to help - https://forum.duolingo.com/comment/17638579. For example - https://www.duolingo.com/skill/cy/Gai/tips-and-notes

There is a summary of the response system here - https://forum.duolingo.com/topic/924/hot and look for the sticky discussion on 'Saying yes and no'.

[CHSBach]

why does it not accept do instead of cei - what is the rule here please