Backward head-tilt occurs with the manual negative marker not in its non-cliticized, free form. Backward head tilt can spread over the predicate when the negative marker is cliticized to the predicate. Non-neutral brow position usually spreads over the entire negative sentence. The example below shows raised eyebrows (re) spreading over the entire sentence and backward head tilt (bht) spreading over the predicate and the cliticized negative marker.
ht-b
re
ix1 speak know^not
‘I can’t speak at all.’
(Zeshan 2003: 63)
In addition to non-neutral brow position, head shake can also spread over more than two elements in a negative sentence:
hs
nbp
ix3pl ix1 say^not
‘I didn’t say these.’
(Gökgöz 2011: 72)
Non-neutral brow position (nbp) may also spread over parts of a subordinate clause of a main clause which is negated.
nbp
[poss1 sister]a ixa car drive like^not
‘My sister does not know how to drive a car.’
(Göksel and Kelepir 2016: 11)