Working "in" or "on": Explaining where you work can require the use of
"ann" (in) or
"air" (on). There is an example of each in the
Places of Work game.
Tha mi ag obair annan
club - I work
in a club and
Tha mi ag obair air bàta - I work
on a boat.
The letters b, p, m, and f: Another thing you may have noticed is that "ann" (in) is sometimes followed by "am" and sometimes by "an". e.g. ann am bùth - in a shop but ann an oifis - in an office. Which to use is determined by the letters b, p, m, and f.
"Am" is used before these letters and "an" before others. This makes for much easier pronunciation.
There are also examples of this in Asking Personal Questions.