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

SIÂN
Be'?
What?

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

SIÂN
Pam?
Why?

MARIAN
Y briodas! Rhaid i mi 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 mi 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 mi fwyta llai o siocled yfory!
I must eat less chocolate tomorrow!