I think he did
I think he do
pro:sub v pro:sub v
i think he did .
aɪ WORD_BOUNDARY θ ɪ ŋ k WORD_BOUNDARY h iː WORD_BOUNDARY d ɪ d WORD_BOUNDARY
i WORD_BOUNDARY t h i n k WORD_BOUNDARY h e WORD_BOUNDARY d i d WORD_BOUNDARY