Columbia subject headings:
Grammar, Comparative and general--Grammatical categories.
Grammar, Comparative and general--Sentences.
Linguistic change.
Thought and thinking.
Harvard subject headings:
Grammar, Comparative and general--Sentences.
Grammar, Comparative and general--Syntax.
Grammar, Comparative and general--Verb phrase.
Princeton subject headings:
Grammar, Comparative and general--Grammatical categories.
Grammar, Comparative and general--Sentences.
Linguistic change.
Thought and thinking.