(By Sonia Cristofaro): "As was done for purpose clauses and ‘when’ clauses (Chapters 125 and 126), reason clauses are defined in functional, rather than morphosyntactic, terms. A reason construction is regarded as one encoding a causal relation between two events, such that one of the two (the event coded by the reason clause, or the dependent event) represents the reason for the other event (the main event) to take place."