The accessibility of terms to the grammatical operation of Subject assignment seems to be constrained by properties which can predict their level of accessibility to this function and which are organised in a hierarchical fashion. The relevance of such feature hierarchies has been stressed in the theory of Functional (Discourse) Grammar, and it is within this framework that the present research has been conducted. Thus, it has been my main concern to test the validity of each of these priority hierarchies in the process of Subject assignment and to provide a descriptive analysis of the different factors determining Subject selection with regard to a particular language, namely English, by analysing a corpus sample of written English ...