English verb conjugation
MUST IMPERIL

Regular verb: imperil - imperilled - imperilled

Affirmation

Simple form	V-ing form
I must imperil you must imperil he must imperil we must imperil you must imperil they must imperil	I must be imperilling you must be imperilling he must be imperilling we must be imperilling you must be imperilling they must be imperilling
Perfect	V-ing perfect
I must have imperilled you must have imperilled he must have imperilled we must have imperilled you must have imperilled they must have imperilled	I must have been imperilling you must have been imperilling he must have been imperilling we must have been imperilling you must have been imperilling they must have been imperilling

Negation

Simple form	V-ing form
I must not imperil you must not imperil he must not imperil we must not imperil you must not imperil they must not imperil	I must not be imperilling you must not be imperilling he must not be imperilling we must not be imperilling you must not be imperilling they must not be imperilling
Perfect	V-ing perfect
I must not have imperilled you must not have imperilled he must not have imperilled we must not have imperilled you must not have imperilled they must not have imperilled	I must not have been imperilling you must not have been imperilling he must not have been imperilling we must not have been imperilling you must not have been imperilling they must not have been imperilling

Interrogative form

Simple form	V-ing form
must I imperil? must you imperil? must he imperil? must we imperil? must you imperil? must they imperil?	must I be imperilling? must you be imperilling? must he be imperilling? must we be imperilling? must you be imperilling? must they be imperilling?
Perfect	V-ing perfect
must I have imperilled? must you have imperilled? must he have imperilled? must we have imperilled? must you have imperilled? must they have imperilled?	must I have been imperilling? must you have been imperilling? must he have been imperilling? must we have been imperilling? must you have been imperilling? must they have been imperilling?

Interro-negative form

Simple form	V-ing form
must I not imperil? must you not imperil? must he not imperil? must we not imperil? must you not imperil? must they not imperil?	must I not be imperilling? must you not be imperilling? must he not be imperilling? must we not be imperilling? must you not be imperilling? must they not be imperilling?
Perfect	V-ing perfect
must I not have imperilled? must you not have imperilled? must he not have imperilled? must we not have imperilled? must you not have imperilled? must they not have imperilled?	must I not have been imperilling? must you not have been imperilling? must he not have been imperilling? must we not have been imperilling? must you not have been imperilling? must they not have been imperilling?