Sub-verb agreement, also known as subject-verb agreement, is an essential grammar rule that ensures that the subject and verb in a sentence agree in number. This means that if the subject is singular, the verb must be singular too, and if the subject is plural, the verb must be plural as well. A sub-verb agreement error occurs when the subject and verb in a sentence do not match in number.

For example, “The cat chases the dogs” is a sentence with correct sub-verb agreement. “The cat” is singular, and “chases” is a singular verb. If we were to change the sentence to “The cats chases the dogs,” we would have an incorrect sub-verb agreement because “cats” is plural, and “chases” is a singular verb.

Sub-verb agreement errors can be confusing and make your writing difficult to read. They can also affect the overall clarity of your message. Readers may be left wondering if you meant to use a singular or plural subject, and this can lead to misinterpretation of your message.

Here are some common sub-verb agreement errors and how to correct them:

1. Plural subjects with singular verbs

This error occurs when a plural subject is paired with a singular verb. For example, “The dogs likes to chase cats.” The subject “dogs” is plural, and “likes” is a singular verb. The correct sentence would be “The dogs like to chase cats.”

2. Compound subjects with a singular verb

This error occurs when two or more singular subjects are joined by “and,” but the verb is in the singular form. For example, “My mom and dad is coming to visit me.” The subjects “mom” and “dad” are singular, but the verb “is” is singular too. The correct sentence would be “My mom and dad are coming to visit me.”

3. Collective nouns with plural verbs

This error occurs when a collective noun, which refers to a group of people or things, is treated as a plural subject. For example, “The team are playing well.” The noun “team” is collective, but the verb “are” is plural. The correct sentence would be “The team is playing well.”

In conclusion, sub-verb agreement is an important grammar rule that ensures that the subject and verb in a sentence agree in number. Understanding this rule and avoiding common errors can improve the clarity of your writing and help you communicate your message effectively.