🙏🏻 Excuse me VS I'm sorry

Excuse me is used to apologise for something you are only going to do, or as a way to politely start a conversation and draw a person's attention.

Excuse me, could you tell me the time? 
Excuse me, but this is my place.
Excuse me, where is the shop?

Sorry is used to apologise for something you have already done. It also can be interpreted as "it's a pity for me".

I'm sorry I have broken your favourite cup.
I'm sorry to hear this devastating news!
I'm sorry to tell you the truth.

Excuse me and sorry can't be used interchangeably, because they imply different feelings. The first is a polite appeal to a person, the second is a way to express regret. The first can be used when a blank face, speaking to a stranger, the second requires you to show you actually feel pity.

#feel_English
@worldspeaksenglish