Word对duìMeaningtoPart of speechprepositionPronunciationCourseHardcore ChineseLessonLesson 6Usages of duì这zhè 个gè 问题wèntí 对duì 他tā 很hěn 重要zhòngyào。zhè gè wèntí duì tā hěn zhòngyào.This question is very important to him.