What is “subject/verb agreement”?

A subject verb agreement is where the subject and verb in each of your sentences agree in:

1. number
2. person.

For the subject and verb to agree in number singular or plural subjects must have a singular or plural verb.The subject takes the base form of the verb in all but the third person singular to make the subject and verb agree in person. In third person singular you need to add an (s) or (es) to the base form of the verb to make both subject and verb agree. The most common way to check and make sure that the subject and verb agree is to identify the subject of each sentence. Verbs are sometimes seperated by words that describe the subject.This can make it difficult to make sure that the subject and verb agree. The key is to make sure that the verb agrees with the subject and not with the word in the modifying phrase.