We went to the library.
1. Did we go to the library?
2. Did we go to the library,or to the theatre?
3. We went to the library, didn't we?
4. Where did we go?
5. Who did go to the library?
6. I wonder where did we go?
He is a driver.
1. Is he a driver?
2. Is he a driver, or a doctor?
3. He is a driver, isn't he?
4. Who is a driver?
5. Who is he?
6. I wonder what is his profession?