Columbia subject headings:
German language--Modality.
German language--Particles.
German language--Semantics.
German language--Verb.
Harvard subject headings:
German language--Modality.
German language--Particles.
German language--Semantics.
German language--Verb.
Princeton subject headings:
German language--Modality.
German language--Particles.
German language--Semantics.
German language--Verb.