26.2 The inflection of the first person pronoun includes TWO FORMS for the genitive, dative, and accusative singular. The two forms have the same meaning, though the unaccented forms are ENCLITIC and less emphatic.
The accent patterns, case endings, and stem changes are irregular and require memorization, as is the case with the first person pronoun in many languages, including English (S 325, G 194).
The stem for this pronoun is (ἐ)μo-/(ἐ)με– in the singular, ἡμε– in the plural. This helps to explain some of the forms, and the fact that the accent for non-enclitics is always on the ultima. For example, ἡμεῖς is derived from ἡμέες. Note that ἐγώ is not associated with these stems (S 326).
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