Welsh - Lesson 4 - How to say "yes" and "no" ?

Questions beginning with

- Wyt ti or Dych chi (polite form) > Ydw / Nac ydw

- Dych chi (plural) > Ydyn / Nac ydyn

- Ydy > Ydy / Nac ydy

- Oes > Oes / Nac oes

Questions to the past

Do / Naddo

Questions beginning with

- Alla i > Galli / Na alli ; Gallwch / Na allwch

- Ga’ i > Cei / Na chei

- Wnei di / Wnewch chi > Gwnaf / Na wnaf

- O’t ti / Oc’h ti > O’n / Nac o’n

- Oedd > Oedd / Nac oedd

When the questions do not begin with a verb

Ie / Nage