Common mistakes
One radical is a hamza. Its seat follows the surrounding vowels: يَقْرَأُ, but يَقْرَؤُونَ and تَقْرَئِينَ.
يَمْلِئُ → يَمْلَأُ Present: heأَمْلِئُ → أَمْلَأُ Present: Iيَمْلِئُونَ → يَمْلَؤُونَ Present: they (m.)تَمْلِئِينَ → تَمْلَئِينَ Present: you (f.)