`  Ah, OK, so the problem really is this term ``verbal markers``... :When the preposition ann an is followed by a possessive determiner, the two words form a contraction. This also occurs with the verbal markers ag (related to the preposition aig) and a+L. The resulting forms have the same effects on the following word (lenition, consonant insertion) as the possessive determiners. After all, ``ag`` is the preposition ``aig`` and this particular ``a`` (the ``a dh'`` one) is the preposition ``a``/``do``.  To me, when you say ``verbal marker``, I think of the other leniting ``a``  m.e. ``tha mi ri rudeigin a dheanamh``  as this is something that only seems to be used with verbs.  At the very least, there's two things ``a``, so the article needs to specify which one it's talking about.   `