There are two kinds of word level category. They are content word (CW) and function word (FW). The explanation as follows:
Content word / CW (lexical words)
Noun: table, book
Verb: write, love
Adj: sad, white
Preposition: in, at, of
Adverb: slowly, carefully
Function words / FW
Determiner: a, an, the, these
Degree word: more, than
Qualifier: seldom, perhaps, (frequency)
Auxiliary: will, would, have to
Conjunction: however, than
Quantifier: (hitungan), one, many.
Differences between content word & function word
Lexical meaning (lexical: dictionary word)
CW: have clear lexical meaning
FW: don’t have clear lexical meaning
Great in number
CW: very great in number
FW: very limited in number
CW: low frequency occurrence
FW: high frequency of occurrence
Identifiable by their formal markers
Derivation: the process of adding affixes. it changing the word and change class of word with suffix process and prefix process.
Ex: final ->finder.
At last: derivational isn’t always change class of word if it is prefix.
Ex: happy –> unhappy = adj -> adj.
Inflexinal: changing the words without change class of word, it must suffix.
Ex: child – children, book – books, high – higher (comparative degree).
Adj phrase: handsome –> more handsome = isn’t inflexional because isn’t one word.
CW: identifiable by their formal markers.
FW: don’t have formal markers.
CW: open class: it can add new word: Ex: internet, software, etc.
FW: close class: isn’t add new word.
The method to separate CW & FW (membedakan)
Of the meaning
Ex. I need water = noun: CWI want to water flower: Verb
Ex. He watchesHe still
Ex. Determiner + NAux + VDeterminer + adj + N