and review and advance in the field of theoretical linguistics. There is little written about agrammatism in Catalan. The beginnings of the field should be encountered in the work of Peña-Casanova & Bagunyà-Durich (1998), and Junque et al. (1989). These papers do not describe case reports, they are rather dealing with more general topics such as lesion localization or rehabilitation of agrammatic patients. The most updated studies could be found in the work of Martínez-Ferreiro (2009). The work of Martínez-Ferreiro is under the so-called Tree Pruning Hypothesis (TPH) of Friedmann & Grodzinsky (2007). Such a hypothesis is somewhat lagging behind after the findings in Bastiaanse (2008) have been proved by means of a re-analysis of data from Nanousi et al. (2006) and Lee et al. (2008), and the work of Yarbay Duman & Bastiaanse (2009). Other rather updated work for agrammatism in Catalan should be found in Martínez-Ferreiro et Gavarró (2007), in Gavarró (2008, 2003a, 2003b, 2002), Balaguer et al. (2004), in Peña-Casanova et al. (2001), and in Sánchez-Casas (2001). From a cross-linguistic perspective under the framework of Universal Grammar (UG), grammatical impairment in agrammatism has been found to be selective rather than complete. Under this line of thought, the impairment in tense production for agrammatic speakers is currently being approached in different natural languages by means of the study of verb inflection for tense in contrast to agreement (a morphosyntactic approach) and also, more recently, by means of the study of time reference (which, in a sense, should be seen closer to morphosemantics). The type of studies this paper should be related with are those dealing with tense impairment under the framework of time reference. Prior to explaining that, to help understand the goals of such research, it is good to give a taste of the shift from morphosyntax to morphosemantics the study of agrammatism is undergoing. Verb Inflection Verb inflection for tense has been found to be problematic in several languages. Different scholars have come up with different theories to explain it: Friedman & Grodzinsky (1997) introduced the so-called Tree Pruning Hypothesis (TPH) from the study of Hebrew, Arabic, and English; the same hypothesis has been proved by Gavarró & Martínez-Ferreiro (2007) for what they called Ibero-Romance (that is, Catalan, Galician, and Castilian); Wenzlaff & Clahsen (2004; 2005) introduced the Tense Underespecification Hypothesis (TUH) for German, and by the same time Bruchert et al. (2005) introduced the Tense