CBSE Class 10 English Grammar - Subject-Verb Concord

A verb must agree with its Number and Person.

In other words, the Verb of a sentence agrees with Number and Person of the Subject of that sentence.

Error of Proximity

Often, the ‘Verb’ is made to agree in number with a norm near it instead of its proper Subject. It is an error. This common error is called the ‘Error of Proximity’. It should be avoided. The verb must agree with its proper Subject.

The price of the apples was very high. (✓)
The price of the apples were very high. (✗)

Number

The basic principle of Subject-Verb agreement is that singular subjects need singular verbs. Plural subjects need plural verbs:

CBSE Class 10 English Gra...ar - Subject-Verb Concord