Questions & Answers about Guardé el secreto.
The accent on guardé shows that this is the yo form of the pretérito (the simple past):
- yo guardé = I kept
- él/ella guardó = he/she kept
The written accent helps distinguish forms and also shows where the stress falls: guar-dé.
Without the accent, guarde would be a different form, such as:
- the present subjunctive: que yo guarde
- or the usted imperative: guarde usted
It is the pretérito indefinido (usually just called the pretérito in many learning materials).
This tense is used for a completed action in the past. So Guardé el secreto presents the action as something finished: I kept the secret.
For example, it suggests something like: