A third-grade student is likely to produce which of the following examples while acquiring inflected morphological forms?

The statement "He sleep until nine every day" exemplifies a common phenomenon in language acquisition where a child may drop the inflectional morpheme for the third person singular present tense. In English, regular verbs typically take an "s" or "es" ending in the third person singular form (e.g., "sleeps"). However, children often produce the base form of the verb as they are still mastering the rules of verb conjugation and inflection.

This statement reflects a stage of language development where children understand the basic meaning of verbs but have not yet fully grasped the rules for inflections. It highlights the developmental progress typical for a third-grade student, who may exhibit such language patterns while acquiring inflectional morphology.

The other options demonstrate various issues with verb tenses or constructions that are less typical for a third grader. For instance, using "goes" in the first option indicates a misalignment of tense with "yesterday," which is a more advanced grammatical concept. The second option contains grammatical errors and lacks coherence, which is often less common for a child at this developmental stage. The third option uses the past tense "went" correctly but lacks the morphological markers typical of a fully developed speaker. Therefore, the