du bist acht jahre alt
du bist acht jahre alt ?
d uː WORD_BOUNDARY b ɪ s t WORD_BOUNDARY  a x t WORD_BOUNDARY j ɑː r ə WORD_BOUNDARY  a l t WORD_BOUNDARY
d u WORD_BOUNDARY b i s t WORD_BOUNDARY a c h t WORD_BOUNDARY j a h r e WORD_BOUNDARY a l t WORD_BOUNDARY