before the verb, but if the verb was the first word in the sentence, * was cliticized to it. Under this theory, then, Old Irish absolute comes from Proto-Celtic *, while conjunct comes from *. The identity of the * particle remains uncertain. Cowgill suggests it might be a semantically degraded form of * "is", while Schrijver (1994) has argued it is derived from the particle * "and then", which is attested in Gaulish. Schrijver's argument is supported and expanded by Schumacher (2004), who points towards further evidence, viz., typological parallels in non-Celtic languages, and especially a large number of verb forms in all Brythonic languages that contain a particle -d (from an older *-t). Continental Celtic languages cannot be shown to have any absolute/conjunct distinction. However, they seem to show only SVO and SOV word orders, as in other Indo-European languages. The absolute/conjunct distinction may thus be an artifact of the VSO word order that arose in Insular Celtic. Possible pre-Celtic substratum Insular Celtic, unlike Continental Celtic, shares some structural characteristics with various Afro-Asiatic languages which are rare in other Indo-European languages. These similarities include verb–subject–object word order, singular verbs with plural post-verbal subjects, a genitive construction similar to construct state, prepositions with fused inflected pronouns ("conjugated prepositions" or "prepositional pronouns"), and oblique relatives with pronoun copies. Such resemblances were noted as early as 1621 with regard to Welsh and the Hebrew language. The hypothesis that the Insular Celtic languages had features from an Afro-Asiatic substratum (Iberian and Berber languages) was first proposed by John Morris-Jones in 1899. The theory has been supported by several linguists since: Henry Jenner (1904); Julius Pokorny (1927); Heinrich Wagner (1959); Orin Gensler (1993); Theo Vennemann (1995); and Ariel Shisha-Halevy (2003). Others have suggested that rather than the Afro-Asiatic influencing Insular Celtic directly, both groups of languages were influenced by a now lost substrate. This was suggested by Jongeling (2000). Ranko Matasović (2012) likewise argued that the "Insular Celtic languages were subject to strong influences from an unknown, presumably non-Indo-European substratum" and found the syntactic parallelisms between Insular Celtic and Afro-Asiatic languages to be "probably not accidental". He argued that their similarities arose from "a large linguistic macro-area, encompassing parts of NW Africa, as well as large parts of Western Europe, before the arrival of the speakers of Indo-European, including Celtic". The Afro-Asiatic substrate theory, according to Raymond Hickey, "has never found much favour