The periphrastic future is defined by the grammarians as expressing something to be done at a definite time to come. And this, though but faintly traceable in later use, is a distinct characteristic of the formation in the language where it first makes its appearance. It is especially often used along with çvás tomorrow.

a. A few examples are: adyá varṣiṣyati...çvó vraṣṭā́ (MS.) it is going to rain today; it will rain tomorrow; yatarān vā ime çvaḥ kamitāras te jetāras (K.) whichever of the two parties these shall choose tomorrow, they will conquer; prātár yaṣṭā́smahe (TB.) we shall sacrifice tomorrow morning; ityahé vaḥ paktā̀smi (ÇB.) on such and such a day I will cook for you; tán ma ékāṁ rā́trim ánte çayitā́se jātá u te ‘yáṁ tárhi putró bhavitā́ (ÇB.) then you shall lie with me one night, and at that time this son of yours will be born. In other cases, this definiteness of time is wanting, but an emphasis, as of special certainty, seems perhaps to belong to the form: thus, bibhṛhí mā pārayiṣyā́mi tvé ’ti: kásmān mā pārayiṣyasī́ ’ty āughá imā́ḥ sárvāḥ prajā́ nirvoḍhā́, tátas tvā pārayitā̀smī́ ’ti (ÇB.) support me and I will save you, said it. From what will you save me? said he. A flood is going to carry off all these creatures; from that I will save you, said it; paridevayāṁ cakrire mahac chokabhayam prāptāsmaḥ (GB.) they set up a lamentation: "we are going to meet with great pain and dread"; yaje ‘yakṣi yaṣṭāhe ca (TA.) I sacrifice, I have sacrificed, and I shall sacrifice. In yet other cases, in the older language even, and yet more in the later, this future appears to be equivalent to the other: thus, prajāyām enaṁ vijñātāsmo yadi vidvān vā juhoty avidvān vā (AB.) in his children we shall know him, whether he is one that sacrifices with knowledge or without knowledge; vaktāsmo vā idaṁ devebhyaḥ (AB.) we shall tell this to the gods; yadi svārtho mamā ’pi bhavitā tata evaṁ svārthaṁ kariṣyāmi (MBh.) if later my own affair shall come up, then I will attend to my own affair; kathaṁ tu bhavitāsy eka iti tvāṁ nṛpa çocimi (MBh.) but how will you get along alone? that, O king, is the cause of my grief about you.