3.5.7.4. Non-manual markers in concessive clauses
A clear change in non-manual marking is systematically used to create a contrast between the sentence-initial clause expressing a concession and the sentence-final clause against which it is contrasted, roughly consisting in raised eyebrows (re) and, optionally, squint eyes (sq).
It should be noticed that the three types of constructions expressing the concessive meaning (concessive clauses, concessive conditionals and adversative coordination) differ in the presence and intensity of the non-manual markings. While concessive conditionals are strongly marked by raised eyebrows over the conditional clause, concessive clauses are less strongly marked by raised brows and, optionally, by squinted eyes. Adversative coordination lacks the presence of specific and consistent non-manual marking.
