Wordde proefMeaningthe experimentPart of speechnounPronunciationCourseDutchLessonDummy subject with infinitives (het is ... om te)Usages of de proefHet is noodzakelijk om de proef te herhalen.It is necessary to repeat the experiment.Het is mogelijk om de proef morgen in het laboratorium te herhalen.It is possible to repeat the experiment tomorrow in the laboratory.