what did he think
what do he think
pro:int mod pro:sub v
what did he think ?
w ʌ t WORD_BOUNDARY d ɪ d WORD_BOUNDARY h iː WORD_BOUNDARY θ ɪ ŋ k WORD_BOUNDARY
w h a t WORD_BOUNDARY d i d WORD_BOUNDARY h e WORD_BOUNDARY t h i n k WORD_BOUNDARY