The original meaning of underpinning is to help cushion. This word is rare in life, and then we will feel strange. Generally speaking, you can get a general idea of this meaning, and then remember it, so that you can understand it well when you encounter this word again in the future. If someone says, I'll help you, then he really wants to help you. Generally, such friends are good and willing to help others. I think it is a good behavior to help you when you are in trouble, so that you can get along better with others. In this way, two people have a kind of dependence on each other, and then they will not be so helpless when they encounter difficulties, because you know that you have friends who are willing to help you, so it is good to do so. But you don't think you trust him enough. You can ask him for help with some small things, but you can try to solve some important things yourself. After all, it is not good for you not to help others when they need help. I hope my answer is helpful to you. Welcome to adopt my answer. Thank you.