My husband is rapidly losing his verbal skills. He cannot remember or confuses the most basic names for things. I am guessing what he is trying to say by asking him subject related questions. Most of the time he can give me a yes or no to my questions, but I often see his frustration when he finally just waves his hand and is silent. I continue to discuss with him everything but it seems that most of the time he listens but cannot interpret what I have said. What can I do?