Irregularity (/ɪregju:lærɪti/) occurs when something doesn't follow established grammatical patterns. A semi-irregularity is when something partially follows an established pattern. English has certain irregularities, including:
- irregular adjectives, i.e. comparative and superlative irregularities.
- irregular verbs, particularly in the past tense and past participle
- modal verbs are irregular, but usually classed separately from irregular lexical verbs.
- Irregular adverbs
- irregular nouns, i.e. irregular plurals.
- irregular spelling, or its flipside irregular pronunciation.