must superheat
Regular verb: superheat - superheated- superheated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must superheat
you must superheat
he must superheat
we must superheat
you must superheat
they must superheat 	I must be superheating
you must be superheating
he must be superheating
we must be superheating
you must be superheating
they must be superheating	I must have superheated
you must have superheated
he must have superheated
we must have superheated
you must have superheated
they must have superheated	I must have been superheating
you must have been superheating
he must have been superheating
we must have been superheating
you must have been superheating
they must have been superheating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not superheat
you must not superheat
he must not superheat
we must not superheat
you must not superheat
they must not superheat 	I must not be superheating
you must not be superheating
he must not be superheating
we must not be superheating
you must not be superheating
they must not be superheating	I must not have superheated
you must not have superheated
he must not have superheated
we must not have superheated
you must not have superheated
they must not have superheated	I must not have been superheating
you must not have been superheating
he must not have been superheating
we must not have been superheating
you must not have been superheating
they must not have been superheating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I superheat?
must you superheat?
must he superheat?
must we superheat?
must you superheat?
must they superheat? 	must I be superheating?
must you be superheating?
must he be superheating?
must we be superheating?
must you be superheating?
must they be superheating? 	must I have superheated?
must you have superheated?
must he have superheated?
must we have superheated?
must you have superheated?
must they have superheated? 	must I have been superheating?
must you have been superheating?
must he have been superheating?
must we have been superheating?
must you have been superheating?
must they have been superheating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not superheat?
must you not superheat?
must he not superheat?
must we not superheat?
must you not superheat?
must they not superheat? 	must I not be superheating?
must you not be superheating?
must he not be superheating?
must we not be superheating?
must you not be superheating?
must they not be superheating? 	must I not have superheated?
must you not have superheated?
must he not have superheated?
must we not have superheated?
must you not have superheated?
must they not have superheated? 	must I not have been superheating?
must you not have been superheating?
must he not have been superheating?
must we not have been superheating?
must you not have been superheating?
must they not have been superheating?