Here's a breakdown:
* Subject-verb agreement: This means the verb in a sentence must agree with its subject in number (singular or plural). For example:
* "The dog barks." (singular subject, singular verb)
* "The dogs bark." (plural subject, plural verb)
* Pronoun-antecedent agreement: This means a pronoun must agree with its antecedent (the noun it refers to) in number, gender, and person. For example:
* "The dog wagged its tail." (singular antecedent, singular pronoun)
* "The dogs wagged their tails." (plural antecedent, plural pronoun)
Agreement ensures clear and grammatically correct writing, making it easier for the reader to understand the relationships between words in a sentence.