What type of error occurs when a student uses the wrong form of a word, such as "goed" instead of "went"?

When a student uses the wrong form of a word, such as "goed" instead of "went," it is classified as a morphological error. Morphology refers to the structure and form of words in a language, including the way words are formed by combining prefixes, roots, and suffixes. In this case, the student incorrectly applies a regular grammatical rule to a verb that is actually an irregular verb. The addition of the regular past tense ending "-ed" to the verb "go" in an attempt to create its past form exemplifies a misunderstanding of English morphology.

Phonological errors would relate to sounds and pronunciation, syntactical errors would involve issues with sentence structure and word order, and semantic errors pertain to the meaning of words and phrases. Therefore, the use of "goed" instead of the correct past tense "went" is a clear demonstration of a misunderstanding of word forms, firmly placing it in the realm of morphological errors.