Błędnie: We all have to suffer of his continual mistakes – he says he learns by experience only. Poprawnie: We all have to suffer from his continual mistakes – he says he learns by experience only.
Czasownika ‘suffer’ („cierpieć”) używamy z przyimkiem ‘from’, np. ‘She suffered from severe pneumonia’ („Cierpiała na ciężkie zapalenie płuc”).