The model of immediate constituents is based on the group-parsing of the sentence which has been developed by traditional grammar together with the sentence-part parsing scheme. It consists in dividing the whole of the sentence into two groups: that of the subject and that of the predicate, which, in their turn, are divided into their sub-group constituents according to the successive subordinative order of the latter. Profiting by this type of analysis, the IC-model explicitly exposes the binary hierarchical principle of subordinative connections, showing the whole structure of the sentence as made up by binary immediate constituents. As for equipotent (coordinative) connections, these are, naturally, non-binary, but, being of a more primitive character than subordinative connections, they are included in the analysis as possible inner subdivisions of subordinative connections [1].