The word ‘success’ is a noun, and as such, it does not have a past tense. Nouns do not change form based on time like verbs do. Instead, ‘success’ refers to the achievement of a goal or favorable outcome at any point in time.
If you’re looking for a verb that relates to ‘success,’ you might consider the verb ‘to succeed.’ The past tense of ‘succeed’ is ‘succeeded.’ For example, you could say, ‘She succeeded in her efforts to complete the project on time.’
In conclusion, while ‘success’ itself doesn’t have a past tense, the verb associated with it does, and understanding the difference between nouns and verbs can clarify these types of questions!