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
  1. /id/ after d,t : hated
  2. /t/ after all other voiceless sounds : picked
  3. /d/ after all other voiced sounds : wedged
  4. /im/ before bilabial sounds : impossible
  5. /il/ before consonant /l/ : illegal
  6. /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 :
  1. Three different allomorphs
Cats /s/
Dogs/z/
Boxes/iz/
  1. 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
1.      additive

















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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