what did he build
what do he build
pro:int mod pro:sub v
what did he build ?
w ʌ t WORD_BOUNDARY d ɪ d WORD_BOUNDARY h iː WORD_BOUNDARY b ɪ l d WORD_BOUNDARY
w h a t WORD_BOUNDARY d i d WORD_BOUNDARY h e WORD_BOUNDARY b u i l d WORD_BOUNDARY