“但是”is a bit formal and has the strongest sense from the aspect of tone.
“不过”is used more frequently in speaking, weak in tone, and sounds polite.
“可是”has a tone like “但是". It is exchangeable with it.
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December 18, 2008
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singing raps from someone like Jay-Z,Black Eyed Peas,ect.
Or you can just enjoy movie.
Practise makes Perfect!
