The sentence is having a subject -verb agreement refers to the sentence where the subject confirms to the verb used.
What is an agreement?
An agreement is the document which binds two parties after accepting it. The acceptance can be given by the signature of both parties.
The subject -verb agreement means that the subject applied in a particular sentence must be in adherence with its main verb being used in it.
The subject is referring to the person or a thing which carries out the action being defined in the sentence. The verb is referring to the action which is get modified with the change in action.
For instance, Mr. X will be going to the mall signifying the future action represented through use of 'will' being performed by X.
Therefore, the subject verb agreement being explained with respect to a sentence.
Learn more about the subject of sentence in the related link:
