Know, Known, Knowing, Knowledgeable

Answers

1. He knew the layout of the house.
2. Our professor was a very knowing/knowledgeable man.
3. She gave us a knowing look when the subject was brought up.
4. I was surprised by the breadth of her knowledge
5. He had no knowledge of the happenings around him.
6. I know how to swim.
7. He was quite knowledgeable about current affairs.
8. The mystery man was a known revolutionary.
9. It is a known fact that he was once a millionaire.
10. She was a small time singer unknown/not known to many people.
11. A politician should know the pulse of the nation.
12. Edison is known for his many inventions.