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Mark number assignment in the VP_M macro and CTX_*_VP context targets

Product: WGrammar Checker Engine SDK (all SDKs)

Problem: The VP_M macro matches verb phrases in a variety of forms. Each word in the verb phrase is saved in mark numbers, starting at the base mark number provided as a parameter to the macro. Because verb phrases have flexible structure (e.g., adverbs can appear almost anywhere), it can be difficult to know in advance to which mark numbers different words in the verb phrase will be assigned. The table below shows which words are assigned to which mark numbers in verb phrases of various forms. Note that the VP_M macro is used by context targets that have "VP" components, such as CTX_SOS_NP_VP, so the mark number assignment applies to these as well.

The table shows the mark number assignment when the base mark number passed to VP_M is 10, but see the documentation for each context target in the WGrammar Reference Guide for the base mark number used for the VP component (e.g., in CTX_SOS_NP_VP, the base mark number for the VP component is 20).

For example, when VP_M matches the phrase "could not be eaten," as in "[The cake] could not be eaten," the word "eaten" would be saved in mark number 14 (assuming 10 was passed as the base mark number). In CTX_SOS_NP_VP, "eaten" would be saved in mark number 24 (because the base mark number for the VP part of CTX_SOS_NP_VP is 20).

Verb phrase	10	11	12	13	14	15	16	17	18	19
eat		eat
quickly eat	quickly	eat
has eaten		has			eaten
certainly has eaten	certainly	has			eaten
certainly has not eaten	certainly	has		not	eaten
has not eaten		has		not	eaten
could eat:		could		eat
certainly could eat:	certainly	could		eat
could not eat		could	not	eat
certainly could not eat	certainly	could	not	eat
could have eaten		could		have		eaten
certainly could have eaten	certainly	could		have		eaten
certainly could not have eaten	certainly	could	not	have		eaten
certainly could not have been eaten	certainly	could	not	have	been	eaten
could be eaten		could		be	eaten
certainly could be eaten	certainly	could		be	eaten
could not be eaten		could	not	be	eaten
certainly could not be eaten	certainly	could	not	be	eaten
is		is
certainly is	certainly	is
is eating		is		eating
is not eating		is	not	eating
certainly is not eating	certainly	is	not	eating
wants to eat		wants	to		eat
certainly wants to eat	certainly	wants	to		eat
wants to not eat		wants	to	not	eat
certainly wants to not eat	certainly	wants	to	not	eat