Halliday & Matthiessen (2014: 354-5)
Figure 5-46 shows the systems of PROCESS TYPE and AGENCY interact in the system network of TRANSITIVITY. This system network adds a subnetwork for ‘verbal’ clauses to the sub-networks given in Figure 5-10 (material clauses), Figure 5-16 (mental clauses), and Figure 5-17 (relational clauses). Note that the mental distinction between ‘emanating’ and ‘impinging’ is now interpreted as the distinction between ‘middle’ and ‘effective’ (but mental clauses with an Inducer are not covered by the system network).
