must intercalate
Regular verb: intercalate - intercalated- intercalated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must intercalate
you must intercalate
he must intercalate
we must intercalate
you must intercalate
they must intercalate 	I must be intercalating
you must be intercalating
he must be intercalating
we must be intercalating
you must be intercalating
they must be intercalating	I must have intercalated
you must have intercalated
he must have intercalated
we must have intercalated
you must have intercalated
they must have intercalated	I must have been intercalating
you must have been intercalating
he must have been intercalating
we must have been intercalating
you must have been intercalating
they must have been intercalating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't intercalate
you mustn't intercalate
he mustn't intercalate
we mustn't intercalate
you mustn't intercalate
they mustn't intercalate 	I mustn't be intercalating
you mustn't be intercalating
he mustn't be intercalating
we mustn't be intercalating
you mustn't be intercalating
they mustn't be intercalating	I mustn't have intercalated
you mustn't have intercalated
he mustn't have intercalated
we mustn't have intercalated
you mustn't have intercalated
they mustn't have intercalated	I mustn't have been intercalating
you mustn't have been intercalating
he mustn't have been intercalating
we mustn't have been intercalating
you mustn't have been intercalating
they mustn't have been intercalating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I intercalate?
must you intercalate?
must he intercalate?
must we intercalate?
must you intercalate?
must they intercalate? 	must I be intercalating?
must you be intercalating?
must he be intercalating?
must we be intercalating?
must you be intercalating?
must they be intercalating? 	must I have intercalated?
must you have intercalated?
must he have intercalated?
must we have intercalated?
must you have intercalated?
must they have intercalated? 	must I have been intercalating?
must you have been intercalating?
must he have been intercalating?
must we have been intercalating?
must you have been intercalating?
must they have been intercalating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I intercalate?
mustn't you intercalate?
mustn't he intercalate?
mustn't we intercalate?
mustn't you intercalate?
mustn't they intercalate? 	mustn't I be intercalating?
mustn't you be intercalating?
mustn't he be intercalating?
mustn't we be intercalating?
mustn't you be intercalating?
mustn't they be intercalating? 	mustn't I have intercalated?
mustn't you have intercalated?
mustn't he have intercalated?
mustn't we have intercalated?
mustn't you have intercalated?
mustn't they have intercalated? 	mustn't I have been intercalating?
mustn't you have been intercalating?
mustn't he have been intercalating?
mustn't we have been intercalating?
mustn't you have been intercalating?
mustn't they have been intercalating?