Subject, Verb, Compliment and Modifier

The subject of a sentence is the person, place, thing or idea that is doing or being something. 

example subject : 

Liam is a Musician.

A verb is a word that expresses an action or a state of being. 

example verb :

Liam sing a song.

Compliment is a remark that says something good about someone or something. 

example compliment :

How kind you are

There are two types of modifiers in the English language: the adjective and the adverb. An adjective describes, or modifies a noun, which is a person, place, thing, or idea, the adverb is primarily modifies verb 

example modifier (adjective) :

The newspaper that Liam has read is very interesting.

example modifier (adverb) :

Liam plays guitar so beautifully.