61. I don't mind

 • Incorrect: 'Will you have some coffee?' 'I don't mind.' 

• Correct: 'Will you have some coffee?' 

'Thank you' 

OR 'No, thank you.' 

Say ‘Thanks’ or ‘Thank you’ while accepting an offer. 

Say ‘No, thanks’ or ‘No, thank you’ while declining an offer. 

'I don't mind' is rude. 

It shows indifference: that the person does not care whether he drinks coffee or not. 

'I don't mind' should be used only when it is permissible to indicate no strong preference.