An affix comes after a word denoting time being in the Locative -7th case in construction, in the sense of 'being good', 'flowering' or 'ripening therein.,
Thus हेमन्ते साधुः = हैमन्तः 'what is good or pleasant in autumn' as हैमन्तः प्राकारः शैशिरमनुलेपम् ॥ So also वसन्ते पुष्प्यन्ति = वासन्त्यः 'vernal creepers i. e. which flower in spring', ग्रैष्म्यः पाटलाः ॥ So also शरदि पच्यन्ते = शारदाः शालयः 'the grains that ripen in autumn'. ग्रैष्मा यवाः 'the barley that ripens in summer'.
This sutra teaches the base and the sense of the affix. It does not directly teach the affix. The above illustrations are examples of the affix अण् &c.,