I have a confusion for using would. I don't know in which situation I have to use would. pls explain clearly with Tamil translation and examples

I have available only in english. Would (past form of will) Often used in auxiliary functions with rather to express preference: I would rather go shopping today. We'd rather say something than stay quiet. Used to express a wish or desire: I would like to have one more pencil. Used to express contingency or possibility: If I were you, I would be so happy. Used to express routine or habitual things: Normally, we would work until 6 p.m.