Begin with a second-person imperfect form, then change it step by step.
1. Make the form jussive: final sukun or removal of inflectional nūn.
2. Remove the imperfect prefix تَ.
3. If the remaining word begins with a consonant cluster, add hamzat al-wasl so it can be pronounced.
تَنْصُرُ ← تَنْصُرْ ← نْصُرْ ← اُنْصُرْ