بایستن

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See also: پایستن

Persian[edit]

Pronunciation[edit]

Verb[edit]

Dari Persian بایستن
Iranian Persian
Tajik боистан (boyistan)

بایستن (bâyestan) (present stem بای(bây))

  1. (defective, auxiliary) to be necessary; must, ought

Conjugation[edit]

Only the following conjugations now exist:

  • باید(bâyad, etymologically third-person singular present, literally it is necessary), extremely commonly used as the equivalent to English constructions with "must", "should", "ought to", "have to", etc.
  • می‌بایست(mi-bâyad), synonymous to باید (bâyad) but less common
  • ‌بایست(bâyest, etymologically third-person singular past), usually largely synonymous to باید (bâyad) despite the use of the past stem, but less common and somewhat more polite; more pedantic usage may have this mean "should have", "must have", etc., preserving the past tense
  • می‌بایست(mi-bâyest), synonymous to بایست (bâyest)
  • بایستی(bâyesti, etymologically second-person singular past) and می‌بایستی(mi-bâyesti, etymologically second-person singular imperfect), both rather archaic and used to express any past necessity without regard for grammatical person

Derived terms[edit]