Combine the following couples of sentences into one using the gerund. A. Mode 1 s: I am his pupil. I am proud of it.- I am proud of being his pupil. I was his pupil. I am proud of it.-I am proud of having been his pupil. 1. He works with professor Collins. He is proud of it. 2. He worked with professor Collins. He is proud of it. 3. He is playing chess with a champion. He is proud of it. 4. He was playing chess with a cham pion. He is proud of it. 5. She made many mistakes. She is ashamed of it. 6. She makes many mistakes. She is ashamed of it.