Shw’mae, fforwm! Dysgais i Gymraeg yn yr ysgol ond nawr dw i wedi anghofio bopeth, llawer o’r geiriau, llawer o’r gramadeg…
Hoffwn i ddweud yn Gymraeg, ‘We hope you enjoy your breakfast’. Dw i’n credu ei fod… ‘Ydyn ni gobeithio nes di mwynhaw dy frecwast’.
Gallwch chi helpu?Ydy hi’n iawn?
Diolch, Hywel
S’mae Hywel, and welcome to the forum! We usually keep to English here so that all our new learners feel comfortable asking questions too… 
If this is talking about something which is about to happen - they’re about to have breakfast - you’d usually hear something like ‘Gobeithio byddwch chi’n mwynhau eich brecwast/Gobeithio byddi di’n mwynhau dy frecwast’ - ‘gobeithio wnest ti fwynhau dy frecwast’ would be ‘Hope you enjoyED your breakfast’…
Ah all understood, aran, and apologies! I can do English too! Thanks very much for the quick response! Really appreciated!!
That all makes sense, I can remember it now .
H
Welcome to the forum Hywel! It certainly doesn’t look to me as if you’ve “wedi anghofio bopeth” 
I’m sure you’ll soon get back up to speed!
Thanks, Siaron, I’m rusty at best! Thanks for taking the time to reply
Shwmae a croeso! 
Welcome Hywel!! All the best with your learning/revising!! 
Welcome to the forum, Hywel! Lots of friendly people here, so come back with questions anytime!