Despite solid work on Arabic modality in theoretical linguistics (Mitchell and al-Hassan, 1994;Brustad, 2000;Moshref, 2012), there are no Arabic corpora annotated for modality, not even the widely used Penn Arabic Treebank.
there is a plethora of work and annotated corpora for modality in other languages, including English (Saurí et al, 2006;Baker et al., 2010;Rubinstein et al., 2013), Portuguese (Hendrickx et al., 2010;Avila and Mello, 2013), Japanese (Matsuyoshi et al.