The No Prep Grammar Builder: Uncontractible Copulas (“Who’s happy?” “She is!”)
“Who’s happy?” “She is!” Typically-developing children acquire the so-called uncontractible copula “he is/she is/they are” at around 36-42 months. But many children with developmental language disorders and children learning English as a second language do not. Instead, they make errors, e.g.: Question: “Who’s smiling?”…Answer: “She” or “Her”. (Incorrect.) These errors make children sound less intelligent…