The second stage of morphemic analysis is identification of morphs. The main criteria here are semantic and phonetic similarity. Morphs should have the same denotational meaning, but their phonemic shape can vary.
e.g. please, pleasing pleasure, pleasant
Phonetically conditioned positional morpheme variants are called allomorphs. They occur in a specific environment, being identical in meaning or function and characterized by complementary distribution,
e.g. the prefix in- (in transitive) can be represented by such allomorphs:
il- il literate
im- im possible
ir- ir regular
Classification of Morphemes
The final stage of the procedure of the morphemic analysis is classification of morphemes.
Morphemes can be classified from different points of view (POV).