Чтобы понять, когда нужно ставить Present Continious, нужно обратить внимания на такие слова сигналы как 'now' (сейчас), 'at the moment' (в этот момент), которые показывают, что действие происходит прямо в момент речи. Present Simple используется, когда действие происходит постоянно или регулярно.
1. I am sitting in the waiting room at the doctor's now.
2. I am not wirking in my office now.
3. Eric is talking about his holiday plans, but Kenny is not listening to him. He is thinking about his new car at the moment.
4. My friend lives in St. Petersburg.
5. My cousing doesn't live in Moscow.
6. The children are not sleeping now.
7. The children play in the yard every day.
8. They don't go to the stadium on Monday.
9. She reads in the evening.
10. She doesn't read in the morning.
Объяснение:... If not for your help, I would not have been able to finish the work yesterday. 2. If he had not come on time, this might not have happened. 3. If it rained, I would be soaked to the bone, as I was wearing a very light dress. 4. If you really enjoyed reading, you would always find time to read. 5. Where would you go if it hadn't been raining? 6.If it rains, I will stay at home. 7. If I said something like that to your aunt, she would think I was crazy. 8. I'll be at home in case you change your mind. 9. It is possible that he would have felt and behaved differently if the circumstances were different. 10. If you weren't so busy, we could go out for lunch. 11. If we didn't have luggage, we could walk to the station. 12. You would feel better if you didn't go to bed so late (to keep late hours). 13. We would not have missed the train if we had taken a taxi. 14. We could go to the skating rink if it wasn't so cold. 15. The play would have liked me more if it had not been so long. 16. You would feel good today if you took the medicine yesterday. 17. If I were in your shoes, I would spend more time outdoors. 18. You would know the language better if you read the books in the original. 19. If not for my illness, I would have already graduated from the university. 20. You wouldn't break the vase if you were careful. We might not have gotten lost if the night hadn't been so dark. 22. I will be back at six if I am not detained at the university. 23. If not for the rain, we could have gone out of town. 24. You would be healthy now if you had consulted a doctor on time. 25. If not for his illness, the family would have moved to the city.