Common mistakes
The root begins with و. In the present it drops out entirely: وَصَلَ becomes يَصِلُ, and the imperative is simply صِلْ.
يَوْضَعُ → يَضَعُ Present: heأَوْضَعُ → أَضَعُ Present: Iيَوْضَعُونَ → يَضَعُونَ Present: they (m.)تَوْضَعِينَ → تَضَعِينَ Present: you (f.)