Derivational and inflectional morphemes.
Derivational morphemes. We use these bound morphemes to make
new words or to make words of a different grammatical category from the stem.
For
example, the addition of the derivational morpheme -ness changes the adjective
good
to the noun goodness.
Inflectional morphemes. These are not used to produce new words in the
language, but rather to
indicate aspects of the grammatical function of a word. Inflectional morphemes
are
used to show if a word is plural or singular, if it is past tense or not, and if it is a
comparative or possessive form.