A Declined Noun

When we matched a pronoun and verb, that was called conjugating. When we match a noun with its case, that's called declining. Here's the word declined in all its forms:

the man
	Singular	Plural
Nominative Case
Genitive Case
Accusative Case

Here's a concrete example of how you use the cases in a sentence:

The man (nominative) is a tailor.

This is the book of the man (genitive). or This is the man's book.

I see the men (accusative plural).

Just as formation of the plural depended upon the gender of a noun and its ending letters, so does the formation of the cases depend upon gender and ending letters.

Case Index Adjectives