So awst can be used without mis but other months can't? In another question, a) "mis ionawr, mis chwefror" and b) "ionawr, chwefror" were given as translations for "january, february", but only a) was accepted. Here, I was marked wrong for only selecting "mis awst" and it says "awst" is a valid translation, too. When do I have to use mis and when can I omit it?
It is best to use mis all the time, really. People do drop it in conversation sometimes if the context is clear, but that is not the case with the isolated sentences that we have on Duo. Similarly with dydd in the names of days, unless there is also a bore/prynhawn.
On this course, we do not accept answers that drop the mis, or dydd unless there is also a bore/prynhawn.
We do aim to be consistent, and in writing up the thousands of new sentences for v2 of the course over the summer we hope to have stuck with including mis except where the context is very clear. Bear in mind that this course is for beginners, so we try and keep things straightforward where we can.
As and when we have time, we will check over v1 sentences as well.
Firstly, it is usual to keep the word mis with the name of a month, as many 'month words' have other meanings when they are used on their own:
- Mawrth - Mars
- mis Mawrth, dydd Mawrth - March, Tuesday
Secondly, the preposition yn (in/at) causes a nasal mutation and also changes in front of certain letters to yng or ym, as explained in the course notes. In this case it changes to ym when followed by any word starting with m-:
- yn + mis Mawrth -> ym mis Mawrth - in March
- yn + Bangor -> ym Mangor - in Bangor
- yn + Pontypridd -> ym Mhontypridd - in Pontypridd
It is not a great problem if you forget to change the yn, as you will still be understood.