1. By the time, I decided to go on a diet, I had put on ten kilos.
2. They waxed the car after they had washed it.
3. Before Lisa sat on the sofa to watch TV, she had made a sandwich
4. As soon as we packed our suitcases, we left for the airport
5. When the lecture started, I entered the lecture hall
6. This is the first time I have tasted Chinese food
7. He has never read a science-fiction book before
8. Như câu 2
9. While Mark was parking his car, he noticed the wing-mirror was broken
10. Ad Judy was walking down the street, she saw an accident
11. I'm sorry I can't take to you now as I'm about to work
12. The Council intends to close the old swimming pool
13. They are planning to have a big wedding in the summer
14. The economy is on the point of collapsing
15. My grandfather is about to go far, far far far far far far far away : (
16. You are due to arrive at 7.30 in the evening
