for doing that for us
for do that for us
prep n:gerund adv prep pro:obj
for doing that for us .
f ɔː ɹ WORD_BOUNDARY d uː ɪ ŋ WORD_BOUNDARY ð æ t WORD_BOUNDARY f ɔː ɹ WORD_BOUNDARY ʌ s WORD_BOUNDARY
f o r WORD_BOUNDARY d o i n g WORD_BOUNDARY t h a t WORD_BOUNDARY f o r WORD_BOUNDARY u s WORD_BOUNDARY