How to comfort my father when he is seriously ill?

Express concern and sympathy, listen and provide practical help.

Here are some suggestions to help provide support and comfort:

1. Express concern and sympathy: express your concern and sympathy for his/her father's illness to the object. Simply saying "I'm sorry to hear that" and "I know it's difficult for you" can make him/her feel your support.

2. Listening: Give the object enough room to speak and let him/her express his/her feelings and emotions. Listening is very important. Sometimes people just need someone who is willing to listen and don't necessarily need to provide solutions.

3. Provide practical help: If you can provide practical help, such as accompanying your partner to the hospital or helping with some housework, try to help.