{"id":"04a2e87db058b7bb32dbacc1f31e19bf","slug":"4yearold-know-hundreds-words-but-struggle-use-past","question":"Why does my 4-year-old know hundreds of words but struggle to use past tense verbs correctly?","answer":"This is a common pattern—your child can understand and use lots of words but still struggle with grammatical rules like past tense. Vocabulary and grammar develop on slightly different timelines and rely on somewhat different skills. A large vocabulary doesn't automatically mean a child has mastered how to use words together.\n\nThe sources I have focus on early toddler language development, which doesn't directly address why a 4-year-old might have strong vocabulary alongside past tense struggles. What research does show is that applying verbs flexibly develops gradually, and individual children move through these stages at different paces.\n\nPast tense difficulties in a 4-year-old can reflect that they haven't yet internalized the grammatical patterns, are still experimenting, or simply need more time. A speech-language pathologist could evaluate whether this is typical for your child's age or if targeted support would help. In the meantime, modeling correct past tense naturally in conversation—\"Yes, we played at the park yesterday\"—gives them examples to absorb.","sources":"[]","thread_json":null,"topic":"milestones-overview","view_count":0,"created_at":"2026-10-18T00:01:07.582Z"}