Analyze the -ing form. 1. Famous for its Windows operating system, Microsoft is the world’s №1 software company. 2. Stop trying to make the company expand. 3. A three-day weekend will reduce the factory’s heating costs.
4. Stability is achieved by avoiding or limiting fluctuations in production, employment, and prices. 5. Maintaining stability is beneficial because it

means uncertainty and disruptions in the economy are avoided. 6. Economic growth is achieved by increasing the economy's ability to produce goods and services. 7. With economic growth, society gets more goods that can be used to satisfy more wants and needs-people are better off; living standards rise; and scarcity is less of a problem.

1. I fed my cat with fish yesterday. 2. What were you doing at four o'clock yesterday? I was feeding my cat. 3. What did your brother do yesterday? He played computer games. 4. I began repairing my camera at six o'clock yesterday. 5. At five o'clock yesterday Helen was cooking soup. 6. We were playing badminton from nine till eleven yesterday. 7. Kate did not go for a walk yesterday. She was writing a composition the whole day yesterday. 8. When did your father come home yesterday? He came home at seven o'clock. 9. When my father came home yesterday, my mother was making supper. 10. We did not go on a tramp last summer. 11. What were you doing when your sister came home yesterday? 12. Were you having supper at nine o'clock yesterday? 13. He did not go to the shop yesterday. 14. Nick went to bed at ten o'clock yesterday. 15. Rick was sleeping at eleven o'clock yesterday. 16. When we were playing in the yard yesterday, it suddenly started raining heavily. 17. I sawMike when he was crossing the street. 18. He began repairing his bicycle in the morning yesterday. 19. He was repairing his bicycle the whole day yesterday. 20. He finished repairing his bicycle in the evening yesterday.

1.I played computer games yesterday. 2. I was playing computer games at five o'clock yesterday. ; 3. He was playing computer games from two till three yesterday. 4. We were playing computer games the whole evening yesterday. 5. What was Nick doing when you came to his place? 6. What were you doing when I rang you up? 7. I was not sleeping at nine o'clock yesterday. 8. What did he do yesterday? - He read a book. 9. What was he doing the whole evening yesterday?--He was reading a book. 10. Was she sleeping when you came home? 11. My brother did not play tennis yesterday. He played tennis the day be­fore yesterday. 12. My sister was not playing the pi­ano at four o'clock yesterday. She was playing the piano the whole evening. 13. When I came into the kitchen, mother was cooking. 14. She was cooking the whole day yesterday. 15. We washed the floor in our flat yesterday. 16. We were washing the floor in our flat from three till four yesterday. 17. Did you do your homework yesterday? 18. Were you doing your homework from eight till ten yesterday? 19. Why was she sleeping at seven o'clock yesterday? 20. He was sitting at the table the whole evening yesterday.