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WORD GRAMMAR
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Verb
- Conjugation in indicative
- Person and number
- Tenses
- Voice
- Mood
- Verb categories
- Valency
- Semantic categories of verbs
- Finite / non-finite verb forms
- Noun
- Adjective
- Adverb
- Article
- Pronoun
- Preposition
- Conjunction
- Particle
- Interjection
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Verb
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SENTENCE GRAMMAR
- Clause types
- Complex clauses
- Constituents of a sentence
- Sentence structure
- Word order in a sentence
- Negation
Umlaut in the plural number
Certain nouns form the plural number with the addition of umlaut to their stem vowel. This is the case with types A, B and C of plural number formation.
| Types of plural | Singular | Plural with umlaut | |
| Type A | ending -e | ||
| Stadt | Städte | ||
| Bach | Bäche | ||
| Knopf | Knöpfe | ||
| Ball | Bälle | ||
| Type B | ending -er | ||
| Haus | Häuser | ||
| Irrtum | Irrtümer | ||
| Bad | Bäder | ||
| Mann | Männer | ||
| Type C | without ending | ||
| Vater | Väter | ||
| Boden | Böden | ||
| Vogel | Vögel | ||
| Mutter | Mütter | ||