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Problem 1 - Entrance Test

Below are verb paradigms from a language of the Nakh-Daghestanian family. Roots are stable; prefixes mark person (1, 2, 3) and number (sg, pl). The prefix for 3sg is Ø. Given that the prefix for 1pl is v-...-t and for 2pl is Ø-...-s, what is the prefix for 1sg?

Correct: A

Compare 1pl v- and 2pl Ø-...-s. In every form the first consonant is the person marker and the final consonant (if any) is the number marker, with sg=Ø. Thus 1sg keeps the person marker v- and drops the plural -t, giving v-.