who's
/huːz/contraction
1.1
- who is.同who is:
who's that?
那是谁？
1.2
- who has.同who has:
who's done the reading?
谁已读过了？
USAGE
A common written mistake is to confuse who's with whose. The form who's represents a contraction of 'who is' or 'who has', while whose is a possessive pronoun or determiner used in questions, as in whose is this? or whose turn is it?