Common mistakes
The root begins with و. In the present it drops out entirely: وَصَلَ becomes يَصِلُ, and the imperative is simply صِلْ.
يَوْعِدُ → يَعِدُ Present: heأَوْعِدُ → أَعِدُ Present: Iيَوْعِدُونَ → يَعِدُونَ Present: they (m.)تَوْعِدِينَ → تَعِدِينَ Present: you (f.)