kto jest

listen to the pronunciation of kto jest
Польский Язык - Английский Язык
who's

Who's your favorite announcer on CNN? - Kto jest twoim ulubionym prezentem CNN?

Who's your favorite TV star? - Kto jest Twoją ulubioną gwiazdą telewizji?

Who is

Who’s that in my bed?.

Who has

Who’s been sleeping in my bed?.

Who's is the usual spoken form of `who is' or `who has', especially when `has' is an auxiliary verb. the short form of 'who is' or 'who has'
contracted form of who is; contracted form of who was