Due to the extended history of the Greek language, it is difficult to point out certain linguistic deviations between distant periods, such as “ancient”, and “current”, Greek. For instance, the pronunciation of Beta, Delta, and Gamma is usually regarded as a significant phonetic variation between Ancient and Modern periods; nevertheless evidence [reference needed] proposes a consonant articulation of Gamma as early as the 4th century BC in Pamphylian, Elean, Boeotian, and perhaps even boorish Attic, and modern pronunciation may come from this (this particle is contested among scholars). The only way to evaluate the development of Greek until modern times, is to examine the language as a whole. This is done by inspecting all its four courses, whose sequential limits are figurative.

The evolution from Ancient Greek to Current Greek has changed phonology, vocabulary and morphology.

The fundamental phonological alterations happened during the Hellenistic and Roman period, and incorporated:

reinstatement of the pitch pronunciation with a stress pronunciation

transcription of the structure of vowels and diphthongs (loss of vowel length difference, monophthongization of most diphthongs, and some important stages of iotacism)

evolution of the voiceless aspirated closing consonants phi and theta to voiceless diphthongs (the related advancement of chi may have taken place subsequential)

probably progress of the voiced stop consonants — gamma, delta, and beta — to voiced diphthongs (the period is argued amidst scholars)

The morphological adjustments influenced both nouns and verbs. Some of the variations to the verbs are aligned to those that distressed the Romance languages as they matured from Vulgar Latin — for example the loss of specific historic tense forms and their reinstatement by new compositions — but the innovations to the nouns have been less far-embracing. Greek has never accomplished the extensive loss of word-endings and noun cases that has for example made Portuguese, French, Spanish and Italian independent languages from Latin.