() () incorrect () Hippocrates () () () incorrect In addition, words that had original in both Attic and Doric were given false Doric forms with in the choral passages of Athenian plays, indicating that Athenians could not distinguish the Attic-Ionic shifted from original Proto-Greek . Attic and Doric ('blade of an oar') incorrect Doric form In Attic, rather than is found immediately after , except in certain cases where the sound formerly came between the and the (see above). Doric , Attic , Ionic ('day') Attic , Ionic ('such as') () Attic , Ionic ('new') () < But Attic , Ionic , Doric and ('young girl') < (as also in Arcadocypriot) The fact that is found instead of may indicate that earlier, the vowel shifted to in all cases, but then shifted back to after (reversion), or that the vowel never shifted at all in these cases. Sihler says that Attic is from reversion. This shift did not affect cases of long that developed from the contraction of certain sequences of vowels that contain . Thus, the vowels and are common in verbs with a-contracted present and imperfect forms, such as "see". The examples below are shown with the hypothetical original forms from which they were contracted. infinitive: "to see" < third person singular present indicative active: "he sees" < third person singular imperfect indicative active: "he saw" < Also unaffected was long that arose by compensatory lengthening of short . Thus, Attic and Ionic had a contrast between the feminine genitive singular and feminine accusative plural , forms of the adjective and pronoun "this, that". The first derived from an original *tautās with shifting of ā to ē, the other from *tautans with compensatory lengthening of ans to ās. Assimilation When one consonant comes next to another in verb or noun conjugation or word derivation, various sandhi rules apply. When these rules affect the forms of nouns and adjectives or of compound words, they are reflected in spelling. Between words, the same rules also applied, but they are not reflected in standard spelling, only in inscriptions. Rules: Most basic rule: When two sounds appear next to each other, the first assimilates in voicing and aspiration to the second. This applies fully to stops. Fricatives assimilate only in voicing, sonorants do not assimilate. Before an (future, aorist stem), velars become , labials become , and dentals disappear. Before a