1. has changed - have changed - active voice (активный залог), present perfect - 3 лицо, ед. число
2. is getting - be getting - active voice, present continuous (progressive), 3 лицо, ед. число
3. will be working - active voice, future continuous (progressive), 3 лицо, ед. число
4. had finished - have finished - active voice, past perfect, 3 лицо, ед. число
Возможно лицо и число указывать не нужно - где как требуют......