This is from the story 草船借箭 in 三国演义。
In English we can say, "How can I help you?" which may have 2 meanings, depending on how we say it.
Meaning 1. In what way can I be of service to you?
If we put strong emphasis on 'I' and 'you', Meaning 2. 'I really don't think I am able to help you."