“Chufei（除非）” may be used to express either the only necessary condition, denoted by “chufei1”, or the exclusive object or condition, denoted by “chufei2”. The exclusive clause of “chufei（除非）” may pre-cede or follow the associated （main） clause. The exclusive clause of “chufei（除非）” and its conclusion clause have positive and negative forms, and the conclusion clauses are distributed in both realistic and non-realistic types of modality, for...
