When it comes to writing clear and effective sentences, one of the most important aspects to consider is agreement. Agreement refers to the grammatical match between two or more words in a sentence.

In English, we have three main types of agreement: subject-verb agreement, pronoun-antecedent agreement, and noun-adjective agreement.

Subject-verb agreement is when the subject of a sentence (the person or thing doing the action) and the verb (the action itself) agree in number and person. For example, «She walks to the store» is correct because «she» is singular and «walks» agrees with it in the third person singular form. «They walk to the store» is also correct because «they» is plural and «walk» agrees with it in the third person plural form.

Pronoun-antecedent agreement refers to the match between a pronoun (a word that takes the place of a noun) and its antecedent (the noun it replaces). For example, «John went to the store. He bought some milk» is correct because «he» replaces «John» as the antecedent.

Noun-adjective agreement is when a noun and an adjective that describe it agree in gender, number, and case. For example, «The red apple» is correct because «red» agrees with «apple» in gender (both are neutral) and number (both are singular).

When writing sentences, it is important to pay attention to agreement to avoid confusion and grammatical errors. A simple rule of thumb is to make sure that all words in a sentence agree with each other in terms of number, person, gender, and case. By doing so, you can craft clear and effective sentences that communicate your message with precision and clarity.