Pāṇini sūtras

When two actions have the same agent the affix ‘ktvâ’ comes after that verb which takes place in a time anterior to that of the other (i. e. the Absolutive in ‘tva’ refers to that action which precedes in time).

1. samāna+kartṛkayoḥसमान+कर्तृकयोः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	samānaसमान	samānaसमान	identical	samānसमान् + plus aअ
   kक्	kartṛkaकर्तृक	kartṛkayoḥकर्तृकयोः	agens	kartṛkकर्तृक् + plus ayoḥअयोः

2. pūrva+kāleपूर्व+काले

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	pūrvaपूर्व	pūrvaपूर्व	antecedent	pūrvaपूर्व
   kक्	kālaकाल	kāleकाले	time	kālकाल् + plus eए

Anuvṛtti

1. ktvāक्त्वा 3·4·18

   Part	Lexeme	Sandhi form	Meaning	Stem
   kक्	ktvāक्त्वा	ktvāक्त्वा	ktvāक्त्वा	ktvāक्त्वा