1. Do you know that man *sitting* in the brown leather chair?
2. Many of the goods that *have been produced* since the beginning of the twentieth century are totally machine-made.
3. I *have known* Beth for six years. When I *met* her, she *was working* in a law office.
4. If you *were* there yesterday, you *met* my parents.
5. *Being* an excellent researcher, Dr. Banes *is respected* by the entire faculty.
6. Had I known Dan wouldn’t be here, I *would not have come*.
7. *Having heard* that story many times before, I got bored when Jim began to tell it again.
8. Anna is grown up now. You shouldn’t speak to her as if she *were* a child.
9. Thank you for your help. I *would never* be able to finish this work without it.
10. I recommended that he *apply* to at least three universities.
11. *Sitting* on a park bench and *watching* the brightly coloured leaves fall gently to the ground, he fell at peace with the world.
12. Why didn’t you tell me about this before? I certainly wish I *had been informed* earlier.
13. Ever since I can remember, mathematics *has been* my favourite subject.
14. It's a funny story, I’ll tell you the details when I *call* you tomorrow.
15. When the puzzled student could not figure out the answer to the puzzle problem, she demanded that I *give* her the correct answer, but I insisted that she *figure* it out for herself.