Поставьте глаголы в скобках в нужную форму
Big: Hi, Bug. I have just (come) home.
Bug: Hi, Big. Have you (see) Johnny?
Big: No, he has not (come) back yet. He has (go) back in time.
Bug: What? We, computer viruses, have never (be) back in time, and this silly boy has (go) there?
Big: Right. We have never (speak) to people from the old times. We have never (wear) old costumes.