"I'll make us a cup of tea now."
Translation:Gwna i baned o de i ni nawr.
Having got this wrong once, I tried an alternative construction, Bydda i yn gwneud baned o de i ni nawr (because I thought it futile simply to copy out the given answer with gwna as the verb), but this was also marked as wrong. I realised afterwards that i yn should have been i'n. Was this the only error in this version, or was the whole idea of using bydd[a] as a future marker inadmissible?
In general 'bydda i'n gwneud' is better translated as 'I will be doing/making' rather than 'I will do/make' since it is a form of the verb 'to be'
So it's a sort of continuous future rather than a simple future action.
eg:- Bydda i'n gwneud cacennau trwy'r dydd yfory = I will be making cakes all day tomorrow
Gwna i gacen yfory = I will make a cake tomorrow
However it is understood when 'bydda i' is used instead of 'gwna i' so your suggestion has now been added, although 'bydda i'n' is the more usual form here.
However the one difference is that there is no mutation to 'paned' when you use 'bydda i'
'Bydda i'n gwneud paned i ni nawr'
Using the future of bod to form a future of other verbs is perfectly acceptable. - but note rmcode's points about the different patterns not being exactly equivalent. Your version with bod should have been:
- Bydda i'n gwneud paned o de i ni nawr
No mutation of paned in that pattern.
The purpose of this set of phrases is to practise the future of gwneud, though:
- Gwna i baned o de i ni nawr
Here, paned is mutated because it is the object of the verb gwna.
I get the message that there is a typo in my answer because I typed gwnaf instead of gwna. Is it really a mistake?
Well, gwna i is more common in the colloquial language, but you might want to write gwnaf i if you were being even slightly formal. We'll add it to the accepted answers.
Using gwnaf without the following i would be more formal than we teach on this course, though. We may perhaps add a unit at the end on some basic letter writing conventions in a future version of the course - that would include a few more formal forms of verbs.