2. Sometimes a noun or pronoun is used to complete the meaning of such verbs as be, become, seem, appear, taste, feel. Such a noun is in the nominative case, and is called a predicate nominative, or a subjective complement; as,

Noun:Mr. Brown is the manager.
He seems a gentleman.
Pronoun: I think it is she.

3. A noun in apposition with another noun in the nominative case is also in the nominative case; as,

Mr. Brown, the manager, is very capable.
The man to whom you should apply is Mr. Brown, the manager.

4. Sometimes a noun or a pronoun is used in direct address or in an exclamation, without having any grammatical relation to the rest of the sentence. It is then said to be nominative independent; as,

Mr. Brown, a gentleman wishes to speak to you.
A strike! Why are they declaring a strike?
You! I thought you were in South America.

5. Sometimes a noun or pronoun is used with a participle to express an adverbial relation. Such a noun is in the nominative case, and is called nominative absolute, because it has no grammatical relation to any other part of the sentence; as,

Mr. Brown having gone, we told the gentleman to see Mr. Jones.

He being the guide, we asked no questions.

It is much better to use a clause to express such an idea; as,