After watching some period dramas and courtroom dramas, I'm really confused of whether to use "my" or "your" when speak to someone with respect.
Are there some rules for these statements or are these just fixed patterns?
It's crude but it can be simplified this way:
Think Feudalism. Lords held lands and people tending their lands are under them. If you're taking care of the lord's land, then you have a lord. So you would say: My Lord. As if noting that: You are my lord.
You want to address the person having grace and honor. Saying "My Honour" or "My Grace" would sound like you're praising yourself.
For the British aristocracy the use of my or your depends upon whether the title is a specific rank or a general form of respect.
A holder of a rank of the nobility should be addressed with the form appropriate, for example a Duke, would be formally addressed as Your Grace. The title is inherent in the rank of Duke. Effectively the speaker is saying that "you are a Duke".
A holder of any noble rank may be addressed as My Lord. Here the speaker is simply recognizing that the addressee is Lord over the speaker. In other words, of higher rank.
Outside the nobility, for example a judge, the use of Your Honour recognizes that the post of judge deserves to be honoured - respected.
your honour
instead of 'my honour', andmy lady
instead ofyour lady
, to me the circumstance and the context are almost the same, which is, they show some courtesy first, before speaking to the lady or the judge. I hope I've made it clear this time :)