How can an old man who can't talk communicate with us?

Hello, first of all, I'm sorry about your father's illness. My father can't talk because of cerebral infarction and cerebellar brainstem blockage in the sixth day of this year, and he needs to insert a stomach tube to eat. The first fifteen days were crucial, and at first he was very anxious. We can only guess what he wants to say, think from his point of view, and think about what he would want at that time, usually water, phlegm and going to the toilet. Once he said something that we didn't understand for a long time. His hand can move a little, so his writing is messy, but we guessed right. It turned out that he wanted to drink tea, which has many functions and can moisten the intestines. He is still trying to save himself. Later, after more than four months of hospitalization, he has recovered himself and stood by and ate, but he still can't walk by himself. He needs to walk on crutches. What I want to tell you is that it is very important to be optimistic in front of the patient, give him positive faith and make him strong. Tell him that he can't worry about the disease, take his time, prepare for a long-term battle, give him more massage, scrub, tell jokes and tell some ways for others to face the disease. Over time, it will gradually get better. I don't know much about your father's specific situation, and I don't know if it will help you.