In Arabic, noun-adjective agreement is governed by four criteria: number, gender, definiteness, and case. Adjectives must match the noun they modify in these aspects. Similarly, subject-verb agreement in Arabic is based on person, gender, and number. Verbs are conjugated differently depending on whether the subject is first, second, or third person, masculine or feminine, singular, dual or plural. Arabic has a complex system of noun-adjective and subject-verb agreement to ensure words are properly paired based on these grammatical rules.