Martin (1992: 373-4):
While message parts are not in themselves phoric, they may be realised phorically, through the systems of SUBSTITUTION and ELLIPSIS at group rank in lexicogrammar. These systems have been presented in detail in Halliday and Hasan (1976) and their discussion has been assumed throughout English Text. It is important to review here however the continuity between nominal and verbal ellipses and substitutes and the taxonomic cline from general superordinate to more specific hyponymic items. This grading is outlined in Table 5.27 and illustrated for nominal and verbal realisations of message parts below (see especially Halliday and Hasan 1976: 106 & 129). Hasan (1985: 74) generalises these relationships under the heading co-classification.
Table 5.27. General
to specific grading of substitution, ellipsis and taxonomic relations
|
||
nominal
|
verbal
|
|
ellipsis
|
–
|
–
|
substitution
|
one, ones
|
do, do so
|
pro-noun/verb
|
one, thing
|
do, happen
|
general noun/verb
|
thing, person, stuff etc.
|
do, take, make etc.
|
superordinate
|
ship (air/space/sailing)
|
attack
|
é
ê
|
boat
|
race
|
sail-boat
|
sail
|
|
yacht
|
manœuvre
|
|
hyponym
|
12-metre
|
tack
|
[5] In discussing cohesive devices (textual metafunction), Hasan (1985: 74) distinguishes co-classification from co-referentiality (identity of reference) as follows:
In this type of meaning relation, the things, processes, or circumstances to which A and B refer belong to an identical class, but each end of the cohesive tie refers to a distinct member of this class.