MARIAN:
Rhaid i fi fynd ar ddeiet.
I must go on a diet.

SIÂN:
Beth?
What?

MARIAN:
Rhaid i fi fynd ar ddeiet.
I must go on a diet.

SIÂN:
Pam?
Why?

MARIAN:
Y briodas! Rhaid i fi golli pwysau.
The wedding! I must lose weight.

SIÂN:
Nac oes.
No.

MARIAN:
Oes! Rhaid i ni fynd i nofio bob dydd.
Yes! We must go swimming every day.

SIÂN:
Bob dydd? Dim diolch.
Every day? No thanks.

MARIAN:
Rhaid i ni chwarae mwy o fadminton hefyd.
We must also play more badminton.

SIÂN:
Chwarae mwy o fadminton? Dim siawns.
Play more badminton? No chance.

MARIAN:
Rhaid i fi fwyta mwy o salad a llai o siocled.
I must eat more salad and less chocolate.

SIÂN:
Mwy o salad a llai o siocled? Iawn!
More salad and less chocolate? Right!

MARIAN:
Rhaid i fi fwyta llai o siocled yfory!
I must eat less chocolate tomorrow!