主谓结构加动词ing形式的例句如下：

1. Mary enjoys listening to classical music.

2. Peter has finished doing his homework.

3. Do you mind opening the window？

4. Alice sat at the table reading the newspaper.

5. Lucy stood at the bus stop waiting for the bus.

6. I am looking for my watch.

7. I am watching TV now.

8. I am working in the factory.

9. He is watering the flowers.

10. Is she playing football？

11. What are you doing？

12. They are eating dinner.

13. Doing is not so easy as saying.

14. Flying in the sky is great fun.

15. Sing is better than saying.

16. ing Group fell 5.3 percent in Amsterdam.

17. Traveling is interesting but tiring.

18. The argument is very convincing.

19. They were very excited at the news.

20. The film is moving.

这些例句展示了主谓结构加上动词ing形式的多种用法，包括作为谓语动词的宾语、伴随状语以及作为句子的主语等。