“…In general, adult HSs of Spanish tend to exhibit considerable rates of optionality in their interpretation and use of indicative and subjunctive in a wide range of structures, affecting contexts that allow for mood alternations more prominently (see, amongst others, Giancaspro, 2017, 2019; Martinez-Mira, 2006; Mikulski, 2006; Perez-Cortes, 2016; Silva-Corvalán, 1994, 2003; Viner, 2018). While lexically-selected complements appear to favor the emergence of subjunctive forms (Montrul, 2007; Van Osch and Sleeman, 2018), constructions featuring mood alternations based on semantic/pragmatic grounds – such as the one examined in this study – show the highest percentages of morphological optionality (Iverson et al, 2008; Montrul, 2009, 2011).…”