Questions & Answers about Jag gjorde ett dumt misstag.
Because gjorde is the simple past form of göra (to do / to make).
- Jag gjorde ett dumt misstag = I made a stupid mistake
- Jag har gjort ett dumt misstag = I have made a stupid mistake
So:
- gjorde = past tense on its own
- gjort = the form used with har in the present perfect
English learners often notice that Swedish uses göra for both do and make, so gjorde can mean either did or made, depending on the context.