must invoke
Regular verb: invoke - invoked- invoked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must invoke
you must invoke
he must invoke
we must invoke
you must invoke
they must invoke 	I must be invoking
you must be invoking
he must be invoking
we must be invoking
you must be invoking
they must be invoking	I must have invoked
you must have invoked
he must have invoked
we must have invoked
you must have invoked
they must have invoked	I must have been invoking
you must have been invoking
he must have been invoking
we must have been invoking
you must have been invoking
they must have been invoking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't invoke
you mustn't invoke
he mustn't invoke
we mustn't invoke
you mustn't invoke
they mustn't invoke 	I mustn't be invoking
you mustn't be invoking
he mustn't be invoking
we mustn't be invoking
you mustn't be invoking
they mustn't be invoking	I mustn't have invoked
you mustn't have invoked
he mustn't have invoked
we mustn't have invoked
you mustn't have invoked
they mustn't have invoked	I mustn't have been invoking
you mustn't have been invoking
he mustn't have been invoking
we mustn't have been invoking
you mustn't have been invoking
they mustn't have been invoking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I invoke?
must you invoke?
must he invoke?
must we invoke?
must you invoke?
must they invoke? 	must I be invoking?
must you be invoking?
must he be invoking?
must we be invoking?
must you be invoking?
must they be invoking? 	must I have invoked?
must you have invoked?
must he have invoked?
must we have invoked?
must you have invoked?
must they have invoked? 	must I have been invoking?
must you have been invoking?
must he have been invoking?
must we have been invoking?
must you have been invoking?
must they have been invoking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I invoke?
mustn't you invoke?
mustn't he invoke?
mustn't we invoke?
mustn't you invoke?
mustn't they invoke? 	mustn't I be invoking?
mustn't you be invoking?
mustn't he be invoking?
mustn't we be invoking?
mustn't you be invoking?
mustn't they be invoking? 	mustn't I have invoked?
mustn't you have invoked?
mustn't he have invoked?
mustn't we have invoked?
mustn't you have invoked?
mustn't they have invoked? 	mustn't I have been invoking?
mustn't you have been invoking?
mustn't he have been invoking?
mustn't we have been invoking?
mustn't you have been invoking?
mustn't they have been invoking?