WordopstijgenMeaningto take off (aircraft)Part of speechverbPronunciationCourseDutchLessonRestrictive conditional clauses (pas als, alleen wanneer)Usages of opstijgenAlleen wanneer de piloot klaar is, zullen we opstijgen.Only when the pilot is ready, will we take off.Pas toen we het vliegtuig hadden zien opstijgen, gingen we naar huis.Only when we had seen the airplane take off, did we go home.