I do speak very good English not like terrible native English speakers from any native English speaking countries. It's stupid to ask such question knowing that the person is an international English teacher. I have about ten years teaching experience in different parts of Asia, and I am sure I can teach English much much better than any native English speakers in the world including you.

Dr.David Ngin Sian Pau MA,PhD,DPh(ongoing research)
www.ciuac.org/res.html