allomorph
Allomorphs
Allomorph is variant form of morpheme about the sounds and
phonetic symbols but it doesn’t change the meaning.
According to Norman, there are three types of allomorph,
phonologically, morphologically and lexically conditioned.
1.
Phonologically
conditioned allomorph
The choice
of allomorph is predictable on the basis of the pronunciation
- Allomorph of the indefinite article: an (before vowels, ex : an elephant) and a (before consonant, ex : a dog) both of them have meaning one,single.
- Allomorphs of the regular past tense morpheme
- /id/ after d,t : hated
- /t/ after all other voiceless sounds : picked
- /d/ after all other voiced sounds : wedged
- /im/ before bilabial sounds : impossible
- /il/ before consonant /l/ : illegal
- /in/ elsewhere : independent
- Some allomorph of the negative prefix in-
2.
Morphologically
conditioned allomorph
The choice
of allomorph is determined by particular morphemes, not just by their
pronounciation, ex : the morpheme –sume in changes to –sumpt- in (consume =
consumption)
3.
Lexically
conditioned allomorph
The choice
of allomorph is unpredictable, thus memorized on a word by word basis, ex : ox
–plural- oxen, sheep-plural- sheep.
There are
examples of allomorph.
Example :
- Three different allomorphs
Cats
/s/
Dogs/z/
Boxes/iz/
- One allomorph
Disagreement
/dis/
Discount
/dis/
Disbelieve
/dis/
3.
Two
different allomorph
Voiced
/d/
Walked
/t/
Stopped
/t/
Kicked
/t/
According
to Libert, there are four types of allomorph

So,
allomorph is variant form of a morpheme about the sounds and phonetic symbol
but it doesn’t change the meaning. Allomorph has different in pronunciation and
spelling according to their condition. It means that allomorph will have
different sound, pronunciation or spelling in different condition.
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