By Singular nouns, Adverbs

Hello Teachers, 1.He is really a good boy. 2.He is a really good boy. I want to know that if there is an adjective modifying a singular noun and an adverb modifying that adjective then where I should put the article. Which one is correct? Thanks.

1) Derivation often changes the word's lexical category, but not always: great (adjective) => great+ly => greatly (adverb) dog (noun) => dog + house => doghouse (noun) 2) Inflection doesn't change the word's lexical category. It adds meaning: number, person, tense: Number: dog (singular noun)...

MrM, I'm sorry but I'm still confused when such modifies a noun, cause I've checked several dictionaries on the net and all have little differences that bother me. So I'll try to make a simple summary of this. * You put an A before a singular noun, and you don't put an A before an uncountable...