Inflect to match nouns and pronouns in number, like 'she runs' versus 'they run'. Adding 's' to 'run' inflects it to agree with 'she'.
Pro Tip 2/3
Not in English
English has limited inflection compared to other languages, relying more on word order. English uses 'the' for all nouns, it doesn't inflect for gender or case.
Pro Tip 3/3
Past Tense Complexity
Inflection can make verbs regular ('talked') or irregular ('spoke') in past tense. We inflect 'talk' to 'talked' but 'speak' to 'spoke'.