We can divide irregular verbs into different groups. In group1 you can find irregular verbs that stay the same in the past simple and past perfect form.
Group 1
| Infinitive | Past Simple | Past Participle | Norsk betydning |
| bet burst cost cut hit hurt let put quit set shut spread split | bet burst cost cut hit hurt let put quit set shut spread split | bet burst cost cut hit hurt let put quit set shut spread split | vedde sprekke koste kutte slå skade/gjøre vondt la putte slutte sette lukke spre dele |