must categorise
Regular verb: categorise - categorised- categorised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must categorise
you must categorise
she must categorise
we must categorise
you must categorise
they must categorise 	I must be categorising
you must be categorising
she must be categorising
we must be categorising
you must be categorising
they must be categorising	I must have categorised
you must have categorised
she must have categorised
we must have categorised
you must have categorised
they must have categorised	I must have been categorising
you must have been categorising
she must have been categorising
we must have been categorising
you must have been categorising
they must have been categorising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't categorise
you mustn't categorise
she mustn't categorise
we mustn't categorise
you mustn't categorise
they mustn't categorise 	I mustn't be categorising
you mustn't be categorising
she mustn't be categorising
we mustn't be categorising
you mustn't be categorising
they mustn't be categorising	I mustn't have categorised
you mustn't have categorised
she mustn't have categorised
we mustn't have categorised
you mustn't have categorised
they mustn't have categorised	I mustn't have been categorising
you mustn't have been categorising
she mustn't have been categorising
we mustn't have been categorising
you mustn't have been categorising
they mustn't have been categorising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I categorise?
must you categorise?
must she categorise?
must we categorise?
must you categorise?
must they categorise? 	must I be categorising?
must you be categorising?
must she be categorising?
must we be categorising?
must you be categorising?
must they be categorising? 	must I have categorised?
must you have categorised?
must she have categorised?
must we have categorised?
must you have categorised?
must they have categorised? 	must I have been categorising?
must you have been categorising?
must she have been categorising?
must we have been categorising?
must you have been categorising?
must they have been categorising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I categorise?
mustn't you categorise?
mustn't she categorise?
mustn't we categorise?
mustn't you categorise?
mustn't they categorise? 	mustn't I be categorising?
mustn't you be categorising?
mustn't she be categorising?
mustn't we be categorising?
mustn't you be categorising?
mustn't they be categorising? 	mustn't I have categorised?
mustn't you have categorised?
mustn't she have categorised?
mustn't we have categorised?
mustn't you have categorised?
mustn't they have categorised? 	mustn't I have been categorising?
mustn't you have been categorising?
mustn't she have been categorising?
mustn't we have been categorising?
mustn't you have been categorising?
mustn't they have been categorising?