I've been studying mandarin phonology for a few years and there's one question that I haven't been able to answer just by looking it up. Does a word that begins with a null initial (i.e. a word that doesn't begin with a consonant) is it always pronounced with a glottal stop before it? Listening to music and people speaking I'm guessing that the glottal stop doesn't occur for words that start with "y" /j/ or "w" /w/, or if the preceding word ends with "ng" /ŋ/However I'm confused if the presence of a glottal stop is affected by other endings preceding it such as: 1.) "深爱" vs "畲耐" 2.) "代傲" vs "带药" 3.) "到爱" vs "到外" Can somebody here please help clear this up for me?