which have been criticized on various grounds, although Starostin himself has proposed a few revisions. All reconstructions of Proto-Sino-Tibetan suffer from the facts that many languages of the huge Sino-Tibetan family are underresearched and that the shape of the Sino-Tibetan tree is poorly known and partly controversial. The use of Starostin's reconstruction of Proto-Yeniseian rather than the competing one by Vajda or that by Werner. The use of Bengtson's reconstruction of Proto-/Pre-Basque rather than Trask's. The slow progress in the reconstruction of Proto-Na-Dené, so that Haida and Athabaskan–Eyak–Tlingit have so far mostly been considered separately. Shared pronominal morphemes Several roots can be reconstructed for the 1st and 2nd person singular pronouns. This may indicate that there were pronouns with irregular declension (suppletion) in Proto-Dené–Caucasian, like "I" vs "me" throughout Indo-European. In the presumed daughter languages some of the roots are often affixes (such as verb prefixes or possessive noun prefixes) instead of independent pronouns. The Algic, Salishan, Wakashan, and Sumerian comparisons should be regarded as especially tentative because regular sound correspondences between these families and the more often accepted Dené–Caucasian families have not yet been reconstructed. To a lesser degree this also holds for the Na-Dené comparisons, where only a few sound correspondences have yet been published. /V/ means that the vowel in this position has not been successfully reconstructed. /K/ could have been any velar or uvular plosive, /S/ could have been any sibilant or assibilate. All except Algic, Salishan and Wakashan are taken from Bengtson (2008). Footnotes: 1 On Caucasian evidence alone, this word cannot be reconstructed for Proto-Caucasian or even Proto-East Caucasian; it is only found in Lak and Dargwa (Bengtson 2008:94). 2 The final found in Sumerian pronouns is the ergative ending. The Emesal dialect has . 3 Proto-Athabaskan , Haida dii . 4 Also in Proto-Southern Wakashan. 5 1st pl.. 6 Tlingit xa , Eyak -, . 7 Masculine verb prefix. 8 Proto-Athabaskan -, Tlingit ÿi > yi = 2nd pl.; Tlingit i , Eyak "thou". 9 Feminine verb prefix. 10 Proto-Athabaskan -, Haida dang /dàŋ/, Tlingit wa.é , where the hypothesis of a connection between the Proto-Athabaskan and Haida forms on the one hand and the rest on the other hand requires ad hoc assumptions of assimilation and dissimilation (Bengtson 2008: 94). 11 Feminine. 12 Proto-Athabaskan -, Eyak -, Tlingit wé , Haida 'wa . 13 2nd sg. Shared noun class pre- and infixes