1. I always go to school by bus.
2. Sam is reading a book now.
3. We have already written the test.
4. Mike has been working here for ten years.
5. We wrote a dictation yesterday.
6. I will have done my work by 5 p.m.
7. Last Monday I was running in the park when I met Ben.
9. We had been waiting for an hour when the bus came.
10. He couldn't walk. He had broken his leg.
11. Mary wants to go home now.
12. I am writing a test tomorrow.