The Dutch written grammar has simplified over the past 100 years: cases are now mainly used for the pronouns, such as ik (I), mij, me (me), mijn (my), wie (who), wiens (whose: masculine or neuter singular), wier (whose: feminine singular; masculine, feminine or neuter plural). Nouns and adjectives are not case inflected (except for the genitive of proper nouns (names): -s, -'s or -'). In the spoken language cases and case inflections had already gradually disappeared from a much earlier date on (probably the 15th century) as in many continental West Germanic dialects.