I'm usually confused with the light tone thing. Here I have the word 曲子 which according to the Internet should be pronounced as qǔzi. However, I have heard some people pronounce it as qū (1st tone) zǐ (3rd tone) and also qú (2nd tone) zǐ (3rd tone). So I'm not sure which way I should pronounce for this word. How do you guys usually pronounce it?
Oh btw, I realize that it might be the same case with 椅子 (yǐ zǐ) which I often hear is pronounced as yí (2nd tone) zǐ (3rd tone). So I usually follow the one I hear more often. Could 曲子 pronunciation be the same case as this?