1. tries
2. try
3. tried
4. Did... try
5. use
6. uses
7. will use
8. to look through
9. looked through
10. will look through
11. were... chatting
12. Do... chat
13. was carrying
14. hopes
15. hoped
16. hope
17. happened
18. did... happen
19.happened
20. happen
21. is happening