A common assumption underlying cross-linquistic studies in child language is that the comparison of any feature in unrelated languages may simplify semantic-grammatical complexities in a way that studies on a single language cannot. This paper begins by discussing the order of acquisition of grammatical morphemes in Spanish by four Spanish-speaking children, aged two years, four months to three years, ten months. Then, this order is compared to Brown's (1973) and the de Villers' (1973) findings for English. The study concludes that comparative analyses are complicated by the differing syntactic and semantic functions of the morphemes in the individual languages. (Author)