Despite the problems found in relation to verbs, to date there have been few studies on the online processing of verb argument structure in children with Specific Language Impairment (SLI). This work explores the role of verb semantics and specifically verb argument structure in language comprehension and language production. To carry out the research, researchers selected four different groups to sample: adults, children with SLI (ages 5;03-8;02), age-matched controls, and mlu-w controls (ages 3;03-7;01). The work comprises six studies based on the Visual World Paradigm (Tanenhaus et al. 1995) that includes the recording of eye movements while people watch different visual scenes with the aim of understanding or producing different words or simple associated sentences. Four of the studies explore language comprehension and the other two language production.