If a child struggles with suffixes and past tense forms, they may have difficulties with which language aspect?

The correct answer is morphology, which is the aspect of language that deals with the structure and formation of words, including the use of prefixes, suffixes, and inflections such as past tense forms. A child struggling with suffixes demonstrates challenges in understanding how these word parts modify the meaning or grammatical function of a base word. For instance, adding “-ed” to a verb to signify past tense is a key aspect of morphology. When children have difficulties with this area, it can significantly affect their ability to form correct words and sentences, impacting their overall language development.

In contrast, syntax refers to the arrangement of words to create meaningful sentences, while phonology focuses on the sounds of speech and their systematic organization. Grammar encompasses a broader spectrum that includes both syntax and morphology, but specifically identifying the struggle with suffixes and past tense forms points to morphology as the most accurate choice.