The adverbial participle and its spelling

The suffixes -gach, -guncha, -gancha, -gani are added to verb stems ending in vowels and voiced consonants: o‘qigach, borguncha, kelgancha, yurgani. After voiceless consonants they may sound like -kach, -kuncha, -kancha, -kani but are written -gach, -guncha, -gancha, -gani: ketgach, o‘sguncha. Only after k do we write -kach, -kuncha, -kancha, -kani, and after q we write -qach, -quncha, -qancha, -qani: tikkach (after sewing), chiqquncha (until going out).