Some morphemes, such as faith in un-faith-ful or dream in dream-ing can stand alone as words which make sense. These are known as free morphemes. You will see how very many simple words are free morphemes, but can combine with other morphemes, both free and bound (see below) to form complex words.
Where two simple words are joined together to form a new complete word, this is called a compound word. Examples include teapot, starlight and careworn. When these terms are first coined, they are shown in some dictionaries with a hyphen, as light-house or fish-finger.
- dis- in dis-miss, dis-pute or dis-grace,
- -ing in dream-ing,
- -ness in happi-ness or sad-ness and even
- -s used to form plurals, as in boy-s or horse-s.
Inflection and derivation
Bound morphemes are traditionally divided into two further classes. Sometimes a word is changed in its form to show the internal grammar of a sentence (“agreement”). Examples would be plural forms of nouns (dog + s → dog-s) or past (imperfect) tenses of regular verbs (want + ed → want-ed). The study of such changes is inflectional morphology (because the words in question are inflected - altered, in this case by adding a suffix).- Inflectional morphology is much easier to recognize. A relatively small number of types of inflection (showing number or tense, say) covers most cases.
- All compound and most complex words show derivational morphology. If a complex word does not show inflection it will show derivation.
This table shows how the most common kinds of inflection are found in three word classes:
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Addition of terminal s to show plural (one cat; two cats); addition of 's to show possession (Henry's cat). | Ending shows tense (wanted) or person ([she] wants). | Addition of -er → comparative (hotter; likelier); addition of -est → superlative (coldest; soonest). |
This table illustrates how derivation can occur:
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Inflection does not really yield “new” words, but alters the form of existing ones for specific reasons of grammar. Derivation, on the other hand, does lead to the creation of new words. There are at least four normal processes of word-formation, of which three are examples of derivation:
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Affix placed before base of word, e.g. disobey | Affix placed after base of word, e.g. kindness | Two base forms are added together, e.g. blackbird | Word changes class, without any change of form, e.g. (the) pet (n) becomes (to) pet (vb.) |
The traditional parts of speech were of eight kinds, excluding the two articles (a/an, the). These were nouns, pronouns, adjectives, verbs, prepositions, conjunctions, adverbs, and interjections. Modern linguists prefer to list words in classes that are coherent - all the words in them should behave in the same way. But if this principle were applied rigidly, we would have hundreds of classes, so irregularities are tolerated!
source:http://babelnet.sbg.ac.at/themepark/grammar/intro.htm
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