the second one. each sumtcita (and tense words are sumtcita) can take a sumti or {ku}

>>558

But "ne'i ve'u" is a single compound tag, so there is no elided KU in the middle.

"ne'i ku ve'u lo kumfa [ku]" is grammatical too, it's two separate terms, but the first "ku" can't be elided.