Agreement is an essential aspect of effective communication and writing. It ensures that the message being conveyed is clear, concise and understandable to the reader. Any sentence on agreement must be written correctly to avoid any confusion and misunderstanding.

In writing, agreement refers to the grammatical match between different parts of a sentence. This includes the subject-verb agreement, pronoun-antecedent agreement and noun-adjective agreement. These agreements help to ensure that the writer is communicating in a clear and accurate manner.

Subject-verb agreement is crucial in any sentence on agreement. It states that the verb must agree with the subject in number and person. For example: The dog runs fast. In this sentence, runs agrees with the subject `dog` in number and person.

Pronoun-antecedent agreement is another important aspect of agreement in writing. It states that the pronoun must agree with its antecedent in number and gender. For example: Sarah plays tennis, and she loves it. In this sentence, `she` agrees with its antecedent `Sarah` in gender and number.

Noun-adjective agreement is also necessary in any sentence on agreement. It states that the adjective must agree with the noun in number and gender. For example: The big tree is beautiful. In this sentence, `big` agrees with the noun `tree` in number and gender.

In conclusion, writing any sentence on agreement should involve careful consideration of subject-verb agreement, pronoun-antecedent agreement, and noun-adjective agreement. Ensuring that these agreements are correctly applied will result in a clear and accurate message that effectively communicates the intended meaning to the reader.