I went to visit them
I go to visit them
pro:sub v inf v pro:obj
i went to visit them .
aɪ WORD_BOUNDARY w ɛ n t WORD_BOUNDARY t ə WORD_BOUNDARY v ɪ z ɪ t WORD_BOUNDARY ð ɛ m WORD_BOUNDARY
i WORD_BOUNDARY w e n t WORD_BOUNDARY t o WORD_BOUNDARY v i s i t WORD_BOUNDARY t h e m WORD_BOUNDARY