A Grammar of Turkish Sign Language (TİD)
Inceptive aspect denotes the beginning of an action whereas inchoative aspect denotes the beginning of a state. In TİD, inceptive/inchoative is marked with the mouth gesture [i:], which is articulated with an intense mouth pattern consisting of gritting the teeth and pulling back the corners of the mouth.
[i:]
enter museum museum beautıful see
‘As soon as I entered the museum I saw the beauties.’
(Dikyuva et al 2015: 220)
The non-manual marker [i:] is used mostly in affirmative clauses.