I'd recommend looking for some IPA pronunciation, specifically for the "Velar Nasal (ŋ) " Te recomendaria revisar IPA, especificamente la nasal veral "ŋ". I de paso revisala toda =P, IPA ayuda mucho si quieres mejorar tu pronunciation y no puedes practicar tanto.

Daniela, aquí tienes la palabra sing con la pronunciación de ella: http://www.thefreedictionary.com/Sing Y aquí tienes "singing": http://www.youtube.com/watch?v=WttNlbaECDY&feature=related Me avisas si no puedes ver el video.

singing = sning There is a free online talking dictionary of English pronunciation. Just click over the pink words to hear them spoken at www.howjsay.com/index.php?word. You can also go to: http://englishphonetics4u.blogspot.com Learn English vocab for free online with sound and pictures Click onto www.learnenglish.de/