At approximately what age does the post-telegraphic stage occur?

The post-telegraphic stage typically occurs around the age of three years. At this stage, children begin to use more complex sentences and demonstrate an understanding of grammatical rules, moving beyond the two-word combinations often seen in earlier stages, such as the telegraphic stage. During the post-telegraphic phase, children start to include function words, such as "is," "the," and "to," as well as more varied sentence structures that demonstrate their expanding vocabulary and cognitive skills.

By the age of three, many children can construct sentences that express relationships between events, use plurals, and form various verb tenses. This progression reflects both their linguistic development and their increasingly sophisticated understanding of language use in social contexts.