The short answer
Watch for retelling, predicting, and reacting: can your child tell you what happened, guess what comes next, or say how a character felt? Ask one or two open questions after the story, use the pictures as clues, and keep it relaxed. Talking together about a story is valuable in itself.
Research on shared reading highlights the value of conversation around books (Early Childhood Research Quarterly, 2023; PubMed Central).

