2. When Robert finished writing his essay, he went out with his friends
3. I walked into the classroom while she was talking with the teacher
4. I used to see Gill more often
5. Brenda felt sick because she had eaten three bars of chocolate
6. We were both very bse yesterday evening: I was doing my Maths homework while Joanna was ironing
7. The Perkins didn't use to be very rich
