What does SVA mean in UNCLASSIFIED

Determining subject-verb agreement requires identifying the verb and its corresponding subject. The verb's form must agree with the number of the subject, either singular or plural. If a sentence contains more than one clause, make sure that each clause has a matching subject and verb.

For example, "She drives" is an example of subject-verb agreement because "she" is singular and so is the verb "drives." By contrast, in the sentence "They drive," both "they" and "drive" are plural.

Yes, when used as a pronoun (as opposed to its meaning as 'not any'), none is always treated as singular unless it is explicitly paired with a plural noun, e.g., none of them were present.

Was is used with simplicity for all persons in the first person, second person and third person singular forms; While were should be used with second and third persons in plural form like they, we and you.

Collective nouns refer to groups made up of multiple people or things but still act as a single unit. These collective nouns are usually considered to be singular so you should use a singular verb form when referring to them such as “the group was” rather than “the group were”.

When in doubt try removing any prepositional phrases from your sentence; If the subject of your sentence remains unchanged after this then it means that it is what determines whether you should use a singular or plural verb - so look at what kind of word it is!

If an action happens regularly (every morning, every day) or necessarily (depends on something else), then present simple tense must be used while Present Continuous tense refers to an action happening right now in progress over some time period generally not expected to stop shortly.

Words like everybody, somebody, nobody and everything can either take individual meaning and therefore take a singular verb or refer collectively to many individuals which would require taking a plural verb depending on which meaning best fits into your sentence contextually.