must intercalate
Regular verb: intercalate - intercalated- intercalated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must intercalate
you must intercalate
she must intercalate
we must intercalate
you must intercalate
they must intercalate 	I must be intercalating
you must be intercalating
she must be intercalating
we must be intercalating
you must be intercalating
they must be intercalating	I must have intercalated
you must have intercalated
she 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
she 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
she 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
she 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
she 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
she 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 she intercalate?
must we intercalate?
must you intercalate?
must they intercalate? 	must I be intercalating?
must you be intercalating?
must she be intercalating?
must we be intercalating?
must you be intercalating?
must they be intercalating? 	must I have intercalated?
must you have intercalated?
must she 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 she 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 she 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 she 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 she 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 she have been intercalating?
mustn't we have been intercalating?
mustn't you have been intercalating?
mustn't they have been intercalating?