He have nonconfidence to be a good singer. 他没有信心成为一个好歌手。
I have nonconfidence to do this task. 我没有信心做这个任务。
The tense relationship between doctors and patients mainly results from patients' nonconfidence of doctors,health administration and technical appraisal institution for medical accidents. 我国医患关系紧张的重要原因是患方对医方不信任,对卫生行政部门、医疗事故技术鉴定机构也不信任。