1) Please, listen to my favourite song. -> Can you listen to my favourite song, please?
2) Walk the dog, please. -> Could you walk the dog, please?
3) Give him some fruit, please. -> Would you give him some fruit, please?
4) Please, have lunch with me. -> Could you have lunch with me, please?
5) Help her in the garden, please. -> Would you help her in the garden, please?