So aethoch is like est in the plural?
Yes, both are versions of mynd in the short past tense.
Yes, and also the polite singular.
I put, "dych chi wedi mynd ar y swyddfa?".
Is that wrong or is it because the exercise in question wants us to use a different format?
Thanks - That makes sense.
I was on a random strengthen skills exercise rather than a specific unit, hence my partial confusion, but tenses differences also noted.