Past Simple Forms:
- 1. be - was/were (irregular)
- 2. decide - decided (regular)
- 3. have - had (irregular)
- 4. get - got (irregular)
- 5. knock - knocked (regular)
- 6. answer - answered (regular)
- 7. open - opened (regular)
- 8. hear - heard (irregular)
- 9. jump - jumped (regular)
- 10. turn - turned (regular)
- 11. see - saw (irregular)
- 12. rush - rushed (regular)
- 13. introduce - introduced (regular)
- 14. shout - shouted (regular)
- 15. walk - walked (regular)
- 16. give - gave (irregular)
- 17. die - died (regular)
- 18. say - said (irregular)
Summary: The task asks to find the past tense forms of the given verbs and classify them as regular or irregular. Regular verbs form their past tense by adding '-ed', while irregular verbs have unique past tense forms that do not follow this rule.