"Excuse me" and "Sorry"

"Excuse me" is asking for permission. 

Examples:

1. If I accidentally step on your toe while I'm trying to get to the door, I'll say: "I'm sorry!"
2. If one of your relatives or friends died, I will probably say: "I'm sorry for your loss."
3. If I'm trying to leave the room and you're in my way, I'll say "Excuse me."
4. If I want you to show me the direction or guide me, I'll say "Excuse me.

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