谁 写 给 谁
shei2 xie3 gei3 shei2
pro:wh v prep pro:wh
谁 写 给 谁 .
ʂ ei̯˧˥ WORD_BOUNDARY ɕ j e˧˩˧ WORD_BOUNDARY k ei̯˧˩˧ WORD_BOUNDARY ʂ ei̯˧˥ WORD_BOUNDARY 
谁 WORD_BOUNDARY 写 WORD_BOUNDARY 给 WORD_BOUNDARY 谁 WORD_BOUNDARY