he didn't know how to speak english
he do know how to speak english
pro:sub mod v pro:int inf v adj
he didn't know how to speak english.
h iː WORD_BOUNDARY d ɪ d n t WORD_BOUNDARY n oʊ WORD_BOUNDARY h aʊ WORD_BOUNDARY t ə WORD_BOUNDARY s p iː k WORD_BOUNDARY ɪ ŋ ɡ l ɪ ʃ WORD_BOUNDARY
h e WORD_BOUNDARY d i d n ' t WORD_BOUNDARY k n o w WORD_BOUNDARY h o w WORD_BOUNDARY t o WORD_BOUNDARY s p e a k WORD_BOUNDARY e n g l i s h . WORD_BOUNDARY