must sacrifice
Regular verb: sacrifice - sacrificed- sacrificed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must sacrifice
you must sacrifice
he must sacrifice
we must sacrifice
you must sacrifice
they must sacrifice 	I must be sacrificing
you must be sacrificing
he must be sacrificing
we must be sacrificing
you must be sacrificing
they must be sacrificing	I must have sacrificed
you must have sacrificed
he must have sacrificed
we must have sacrificed
you must have sacrificed
they must have sacrificed	I must have been sacrificing
you must have been sacrificing
he must have been sacrificing
we must have been sacrificing
you must have been sacrificing
they must have been sacrificing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not sacrifice
you must not sacrifice
he must not sacrifice
we must not sacrifice
you must not sacrifice
they must not sacrifice 	I must not be sacrificing
you must not be sacrificing
he must not be sacrificing
we must not be sacrificing
you must not be sacrificing
they must not be sacrificing	I must not have sacrificed
you must not have sacrificed
he must not have sacrificed
we must not have sacrificed
you must not have sacrificed
they must not have sacrificed	I must not have been sacrificing
you must not have been sacrificing
he must not have been sacrificing
we must not have been sacrificing
you must not have been sacrificing
they must not have been sacrificing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I sacrifice?
must you sacrifice?
must he sacrifice?
must we sacrifice?
must you sacrifice?
must they sacrifice? 	must I be sacrificing?
must you be sacrificing?
must he be sacrificing?
must we be sacrificing?
must you be sacrificing?
must they be sacrificing? 	must I have sacrificed?
must you have sacrificed?
must he have sacrificed?
must we have sacrificed?
must you have sacrificed?
must they have sacrificed? 	must I have been sacrificing?
must you have been sacrificing?
must he have been sacrificing?
must we have been sacrificing?
must you have been sacrificing?
must they have been sacrificing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not sacrifice?
must you not sacrifice?
must he not sacrifice?
must we not sacrifice?
must you not sacrifice?
must they not sacrifice? 	must I not be sacrificing?
must you not be sacrificing?
must he not be sacrificing?
must we not be sacrificing?
must you not be sacrificing?
must they not be sacrificing? 	must I not have sacrificed?
must you not have sacrificed?
must he not have sacrificed?
must we not have sacrificed?
must you not have sacrificed?
must they not have sacrificed? 	must I not have been sacrificing?
must you not have been sacrificing?
must he not have been sacrificing?
must we not have been sacrificing?
must you not have been sacrificing?
must they not have been sacrificing?