It is the criterion of "interruptability" (or "insertability") which distinguishes the Englsh article or Macedonian article. It is possible to "interrupt" (or "insert" within) the sequence "the-boy", whereas it is not possible to "interrupt" the sequence "grad-ot" or "lup-ul": by "interruptability" is meant the possibility of inserting other elements, more or less freely, between the morphemes or "blocks" of morphemes.
- Lyons (2004), Pag. 22