"친구가 길에 누워요."
Translation:A friend lies down on the road.
In English, we pronounce our N's with our tongues to the top of our mouths, slightly behind the upper teeth. We also give a short "nnn" buildup. Try saying "No" and see if you can recognize that short buildup that makes it sound more like "nnNo."
Koreans make the N noise abruptly without buildup. They also produce the sound between their upper and lower teeth. Pushing the sound out quickly can make it sound like a D.