“…In addition, certain grammatical properties have different activation and developmental schedules: some are acquired during childhood, while others are mastered later in school. For example, the expression of subjunctive mood in Spanish emerges by age 2 in monolingual children (López Ornat, 1994), but full command and use is not mastered until 12 years of age (Blake, 1983). When children are exposed to two languages, the amount of input in the home language is substantially reduced, and consequently, it is common to find signs of "attrition" in adulthood: structural properties that were acquired or mastered by age 4-6 are lost, resulting in difficulties with lexical production and interpretation (Schmid & Jarvis, 2014), or speakers use code-switching strategies and lexical borrowings to compensate for gaps during speech (J.…”