My son always said "I beg your pardon" very fast, and we always wondered why he didn't just say pardon. He said he thought it was one whole word: ibegyourpardon
When our DS was little, and we were teaching him to say 'please', he took our reinforcement too literally. It would go like this:
DS: "Can I have a treat?"
Us: "Can I have a treat......??????"
DS: "Can I have a treat, PLEASE?!"
Us: "Good boy, nice manners!"
He figured that we were teaching him the full extended phrase you have to say to be polite and guarantee a positive response - rather than just affirming him when he got his request right.
Therefore, he started asking "Can I have a treat, please, good boy, nice manners?!"
Then, when we said "No, sweetheart, you've already had enough treats for now", he would be in floods of tears with "Waaaahhh!!! But I said 'yes, please, good boy, nice manners'!!!!!". It was so cute and it did sometimes work on occasion.