A study evaluated morphosyntactic abilities in 228 Colombian children aged 24 to 50 months using the 20-Sentence Repetition Task (20-SRT), a shortened version of the 33-SRT. The participants were drawn from child-care centers in areas classified as high or low socioeconomic status (SES). Findings indicated age-related improvements in sentence repetition performance, with older children achieving higher scores. Additionally, girls outperformed boys, although the difference was nearly significant. Most notably, children from higher SES backgrounds performed significantly better than their lower SES counterparts. The study highlights the impact of socioeconomic status on language development and emphasizes the importance of sentence repetition tasks as clinical markers for identifying language disorders in children.