What are 15 grammar rules for nouns?
You need to look at their function and distribution. For example,
Do nouns function as subjects and/or objects?
Do nouns function as direct objects and indirect objects?
What about verbs? Do nouns function as verbs?
Do nouns function as adverbs?
Can nouns be modified?
If so, by adjectives and/or adverbs?
Can nouns function as modifiers?
What's the word-order?
Are all nouns the same or do they belong to different classes?
When reading a sentence or hearing a phrase, how do we know a noun is a Noun?
Can nouns be inflected? If so, what are the morphemes?
What's the difference between plural "sheep" and plural "books"?
What about, "the dog's house" and "the Jones' house"? Why -'s and -s'?
"A noun doesn't/isn't/can't _______".