Jesus is talking to a group of people about what might happen to them as individuals. The instances of "you" and "your" are all plural. (See: [[rc://en/ta/man/translate/figs-you]])
These are metaphors for praying to God. The verb form shows that we are to keep praying until he answers. If your language has a form for continuing to do something over and over, use it here. (See: [[rc://en/ta/man/translate/figs-metaphor]])
To knock on a door was a polite way to request that the person inside the house or room open the door. If knocking on a door is impolite or not done in your culture, use the word that describes how people politely ask for doors to be opened. AT: "Tell God you want him to open the door"
This refers to food in general. AT: "some food" (See: [[rc://en/ta/man/translate/figs-synecdoche]])
# stone ... fish ... snake
These nouns should be translated literally.
# Or if he asks for a fish, will give him a snake?
Jesus asks another question to teach the people. It is understood that Jesus is still referring to a man and his son. AT: "And there is not one person among you, if his son asks for a fish, will give him a snake." (See: [[rc://en/ta/man/translate/figs-rquestion]] and [[rc://en/ta/man/translate/figs-ellipsis]])