Pāṇini sūtras

Optionally the affixes luṅ and laṭ come after a verb, in denoting past time not belonging to the current day, when the word purā is used in the sentence, provided that the word sma is not used.

1. puriपुरि

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	purपुर्	puriपुरि	purā [indecl.]पुरा [इन्देच्ल्.]	purपुर् + plus iइ

2. luṅलुङ्

   Part	Lexeme	Sandhi form	Meaning	Stem
   lल्	luṅलुङ्	luṅलुङ्	aorist	luṅलुङ्

3. caच

   Part	Lexeme	Sandhi form	Meaning	Stem
   cच्	caच	caच	and	caच

4. a+smeअ+स्मे

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aअ	aअ	not	aअ
   sस्	smaस्म	smeस्मे	sma [word]	smस्म् + plus eए

Anuvṛtti

1. laṭलट् 3·2·118

   Part	Lexeme	Sandhi form	Meaning	Stem
   lल्	laṭलट्	laṭलट्	present	laṭलट्

2. vibhāṣāविभाषा 3·2·121

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   vव्	vibhāṣविभाष्	vibhāṣāविभाषा	option	vibhāṣविभाष् + plus āआ