Columbia subject headings:
Languages, Modern--Aspect.
Languages, Modern--Grammar, Comparative.
Languages, Modern--Resultative constructions.
Languages, Modern--Verb.
Harvard subject headings:
Languages, Modern--Aspect.
Languages, Modern--Grammar, Comparative.
Languages, Modern--Resultative constructions.
Languages, Modern--Verb.
Princeton subject headings:
Grammar, Comparative and general--Aspect.
Grammar, Comparative and general--Verb.