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I am sorry that I can't give you an answer about " lovers"
I thought again and again but I couldn't find the answer.
Maybe they seem to be aliens or monsters.
I found an advice about learning English in Walter foreman's website
Try to listen to the strategy from the following website.
http://www.effortlessenglishclub.com/freemp3.html?gclid=CNits6L9kJQCFR0ZagodMUsvtg

About "I'm sorry"

When you step on someone's foot in the bus, what do you say?
It is n0t surprising to say,"I'm sorry." Do you feel the same pain as his or hers when you say,'I am sorry'? It is undoubted that you don't feel any pain. That's why you say "I'm sorry."
The expression "I'm sorry." is a kind of trade or deal in this situation.
Why are lovers afraid of "I'm sorry"?

Expression "I'm sorry."

The expression "I'm sorry" must not be used between lovers. Why?

How can you bring three things?

This question is related to your fortune.
You have a sparrow, a snake, and a monkey.
How will you carry them to your destination?
You must not throw one of them away.
There is no correct answer.
But three things stand for something.