Assertion: verb's infinitive | /r/ObjectUse | used with modal verbs
Facets:
value: particularly
type: DEGREE
Source sentences:
text: This applies particularly when the perfect infinitive is used together with modal verbs: for example, he could not have been a genius might be considered (based on its meaning) to be a past tense of he cannot/could not be a genius; such forms are considered true perfect forms by some linguists but not others.