must instance
Regular verb: instance - instanced- instanced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must instance
you must instance
she must instance
we must instance
you must instance
they must instance 	I must be instancing
you must be instancing
she must be instancing
we must be instancing
you must be instancing
they must be instancing	I must have instanced
you must have instanced
she must have instanced
we must have instanced
you must have instanced
they must have instanced	I must have been instancing
you must have been instancing
she must have been instancing
we must have been instancing
you must have been instancing
they must have been instancing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not instance
you must not instance
she must not instance
we must not instance
you must not instance
they must not instance 	I must not be instancing
you must not be instancing
she must not be instancing
we must not be instancing
you must not be instancing
they must not be instancing	I must not have instanced
you must not have instanced
she must not have instanced
we must not have instanced
you must not have instanced
they must not have instanced	I must not have been instancing
you must not have been instancing
she must not have been instancing
we must not have been instancing
you must not have been instancing
they must not have been instancing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I instance?
must you instance?
must she instance?
must we instance?
must you instance?
must they instance? 	must I be instancing?
must you be instancing?
must she be instancing?
must we be instancing?
must you be instancing?
must they be instancing? 	must I have instanced?
must you have instanced?
must she have instanced?
must we have instanced?
must you have instanced?
must they have instanced? 	must I have been instancing?
must you have been instancing?
must she have been instancing?
must we have been instancing?
must you have been instancing?
must they have been instancing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not instance?
must you not instance?
must she not instance?
must we not instance?
must you not instance?
must they not instance? 	must I not be instancing?
must you not be instancing?
must she not be instancing?
must we not be instancing?
must you not be instancing?
must they not be instancing? 	must I not have instanced?
must you not have instanced?
must she not have instanced?
must we not have instanced?
must you not have instanced?
must they not have instanced? 	must I not have been instancing?
must you not have been instancing?
must she not have been instancing?
must we not have been instancing?
must you not have been instancing?
must they not have been instancing?