Which morpheme is learned by children aged 28-36 months in Brown's Stage 2?

In Brown's Stage 2, children between the ages of 28 to 36 months typically begin to master the present progressive -ing morpheme. This morpheme signifies ongoing actions and is one of the early grammatical forms that children acquire as they develop their language skills. During this stage, children often start combining words, and the inclusion of -ing allows them to express actions that are happening at the moment, which is crucial for their communicative competence.

Present progressive -ing is also foundational in children's language development because it reflects an understanding of time and action, paving the way for more complex sentence structures in the future. Mastery of this morpheme indicates progress in a child's ability to convey dynamic actions and enhances their overall expressive vocabulary.

In contrast, while the regular past tense -ed, demonstrative pronouns, and irregular past tense are important aspects of language development, they are typically acquired by children at later stages. Therefore, the focus on present progressive -ing during Stage 2 highlights a significant milestone in early linguistic development.