1. They had been preparing the medicine for 45 minutes before everything was ready. 2. Doctor had written out the recipes five minutes before I came. 3. We had been looking for a drugstore for about 20 minutes before we found it. 4. I had been reading the medical encyclopedia for a few minutes before I found the desired information. 5. My son had not been waiting even for fifteen minutes when the doctor came. 6. Doctors had worked on this issue for three years before they went on a world scientific conference.
1. He cleaned his room yesterday.
2. He cleans his room every day.
3. He will clean his room tomorrow.
4. The girls will dance at the concert last week.
5. The girls will dance at the concert next week.
6. The girls often dance at the concert .
7. I shall not see my friends next summer.
8. I didn't see my friends last summer.
9. I dont see my friends every day.
10. You usually read books in the evenings?
11. Did you read a book last night?
12. Will you read a books tomorrow?
13. Why you run in the classroom yesterday?
14. Why you will run in the gym tomorrow?
15. Why you run in the park every day?