bhū gets the augment v (vuk) before the tense-affixes of the Aorist and the Perfect, when beginning with a vowel.,
Thus अभूवन्, अभूवम्; बभूव, बभूवतुः, बभूवुः ॥,
भुवो वुग् लुङ्लिटोः
Adhyāya 6 · Pāda 4 · Rule 88
Adhyāya 6 · Pāda 4 · Rule 88
bhū gets the augment v (vuk) before the tense-affixes of the Aorist and the Perfect, when beginning with a vowel.,
Thus अभूवन्, अभूवम्; बभूव, बभूवतुः, बभूवुः ॥,