zaczyna

third-person singular present of zaczynać

być

1. to be indicates sameness or membership in a class
2. to be auxilary verb used for predication
3. in future tense, forms future tense of imperfective verbs
4. in past tense, forms pluperfect tense
5. to be indicates location, there be

kimś

1. instrumental of ktoś
2. locative of ktoś