When someone asks me a question like this ---"Are you working here, aren't you?(with falling tone)" my respose to it should be "Yes, I am." due to his strong implication through the falling tone. Please correct my grammar in the above sentence! Thanks for your professional help!
You don't need a question tag when the word construction is already a question.
Are you working here?
You're working here, aren't you?
Is this your car?
This is your car, isn't it?
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.
Whether the tone is rising or falling the answer is either 'Yes, I am' or 'No, I'm not'.