Поставьте предложения в Past или Future Indefinite
1. There are some department in the company
2. I am at the head office till four o'clock

1) There will some department in the company 2) I was at the head office till four o'clock

FUTURE1) There will be some departments in the company next year. 2) I'll be at the head office till four o'clock tomorrow.PAST1) There were some departments in the company last year.2) I was at the head office till four o'clock yesterday.