The Future Active Periphrastic Conjugation

The Future Active Periphrastic Conjugation. The future active participle in -ūrus, -a, -um is sometimes used with the verb esse as an alternative to the simple future indicative, often to achieve a particular emphasis. It denotes that the action is likely or destined or intended, etc.

ille malē peritūrus est.“He is likely to die miserably.”
prō certō moritūrus est.“He is certainly going to die.”
cūr moritūra sum?“Why am I destined to die?”
eam ad aram tractūrī sunt.“They are intending to drag her to the altar.”