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すみません， 済みません
1. excuse me, pardon me, I'm sorry, I beg your pardon
2. thank you, you shouldn't have, it's too much
对不起，劳驾，不好意思，请原谅；谢谢！费心了！
が
1. indicates the subject of a sentence
2. indicates possession
3. but, however, (and) yet, though, although, while
4. and
5. used after an introductory remark or explanation
6. regardless of ..., whether ... (or not), no matter ...
7. indicates a des...
tbd
