German adjective endings transform to express comparisons: comparatives show more/less, and superlatives express the highest/lowest degree. Both forms also match the noun’s gender, number, and case.
  • Comparatives add -er to the adjective stem (e.g., schnellschneller).
  • Superlatives add -sten/-esten and require a preceding am for predicative use (e.g., schnellam schnellsten).
  • Adjective endings for comparatives and superlatives vary with the same declension rules as regular adjectives.
The comparative ending is -er.
Use -sten/-esten and am for superlatives.
Yes, they follow normal adjective agreement rules.

Comparative

The comparative form expresses "more ... than" or "less ... than."
  • Base adjective + -er = comparative form.
  • Use als for “than” in comparisons:
Markus ist schneller als Julia.
(Markus is faster than Julia.)
  • Adjective endings are added to the comparative form when used attributively, according to gender, number, and case.
PositiveComparativeExample (m, nom)
schnellschnellerDer Zug ist schnell.
Der Zug ist schneller.
The comparative form is 'schneller'.

Comparative Adjective Endings

Attributive comparatives get adjective endings like regular adjectives:
CaseMasculineFeminineNeuterPlural
Nominative-er-e-es-en
Accusative-en-e-es-en
Dative-en-en-en-en
Genitive-en-en-en-en
Example:
  • Der schneller Wagen (m, nom)
  • Die schnelle Frau (f, nom)
  • Das schnelle Auto (n, nom)
  • Die schnellen Leute (pl, nom)

Superlative

The superlative expresses "the most ..." or "the least ..."
  • Add -st (or -est if the adjective stem needs it) + correct ending for attributive use.
  • Use am ... -sten for predicative/adverbial superlatives.
PositiveSuperlative (attributive)Superlative (predicative)Example (m, nom)
schnellder/die/das ... schnellste(n)am schnellstenDer schnellste Zug ...

Attributive Superlative

Attach -ste + adjective ending:
CaseMasculineFeminineNeuterPlural
Nominative-ste-ste-ste-sten
Accusative-sten-ste-ste-sten
Dative-sten-sten-sten-sten
Genitive-sten-sten-sten-sten
Example:
  • Der schnellste Mann (m, nom)
  • Die schnellste Frau (f, nom)
  • Das schnellste Kind (n, nom)
  • Die schnellsten Personen (pl, nom)

Predicative/Adverbial Superlative

Use am + adjective stem + -sten (for regular stems) or -est (if needed for pronunciation):
  • Das Auto fährt am schnellsten. (The car drives fastest.)
  • Sie arbeitet am fleißigsten. (She works most diligently.)
German adjectives use "-er" for comparatives and "-(s)te(n)" for superlatives, matching noun endings for gender, number, and case. Comparatives link two things with "als," while superlatives highlight the extreme with "am ... -sten" for predicative use.
  • Comparatives: schnellschneller (+ endings), and "als" is used for “than.”
  • Superlatives: schnellder/die/das Schnellste (attributive), am schnellsten (predicative).
  • Both forms follow regular adjective agreement rules.