Syntactic Function
It has to do with why or what those words are placed for
Syntactic Structure
It deals with the words, constituents, elements or components of a sentence or phrases
CONJUNCTION PHRASE
It is a phrase whose headword is a conjunction
PREPOSITIONAL PHRASE
It is a phrase whose headword is a preposition
You are the friend of mine
ADVERBIAL PHRASE
It is a phrase whose headword is an adverb
Subtema
VERBAL PHRASE
It is a phrase whose headword is a verb
I have done my homework for hours
ADJECTIVAL PHRASE
It is a phrase whose headword is an adjective
This homework is very important
NOUN PHRASE
It is a phrase whose headword is a noun or a pronoun
A beautiful house
SYNTAX
Sentence Construction
How words group together to make phrases and sentences
S + V + C
I eat an apple