Declension table of ?auparava

Neuter	Singular	Dual	Plural
Nominative	auparavam	auparave	auparavāṇi
Vocative	auparava	auparave	auparavāṇi
Accusative	auparavam	auparave	auparavāṇi
Instrumental	auparaveṇa	auparavābhyām	auparavaiḥ
Dative	auparavāya	auparavābhyām	auparavebhyaḥ
Ablative	auparavāt	auparavābhyām	auparavebhyaḥ
Genitive	auparavasya	auparavayoḥ	auparavāṇām
Locative	auparave	auparavayoḥ	auparaveṣu

Compound auparava -

Adverb -auparavam -auparavāt