Declension table of pūrvaka

Neuter	Singular	Dual	Plural
Nominative	pūrvakam	pūrvake	pūrvakāṇi
Vocative	pūrvaka	pūrvake	pūrvakāṇi
Accusative	pūrvakam	pūrvake	pūrvakāṇi
Instrumental	pūrvakeṇa	pūrvakābhyām	pūrvakaiḥ
Dative	pūrvakāya	pūrvakābhyām	pūrvakebhyaḥ
Ablative	pūrvakāt	pūrvakābhyām	pūrvakebhyaḥ
Genitive	pūrvakasya	pūrvakayoḥ	pūrvakāṇām
Locative	pūrvake	pūrvakayoḥ	pūrvakeṣu

Compound pūrvaka -

Adverb -pūrvakam -pūrvakāt