Final answer:
Expressive aphasia is when a stroke patient understands language but cannot respond verbally correctly due to difficulty in language production.
Step-by-step explanation:
When a CVA client (cerebrovascular accident, commonly known as a stroke patient) understands your question but can't respond verbally correctly, he is said to have expressive aphasia. This type of aphasia is characterized by the loss of the ability to produce language (spoken or written). The individual understands the language but has difficulty communicating verbally, meaning they know what they want to say but cannot express it properly. This is in contrast to receptive aphasia, where the individual would have trouble understanding received language.