must customise
Regular verb: customise - customised- customised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must customise
you must customise
he must customise
we must customise
you must customise
they must customise 	I must be customising
you must be customising
he must be customising
we must be customising
you must be customising
they must be customising	I must have customised
you must have customised
he must have customised
we must have customised
you must have customised
they must have customised	I must have been customising
you must have been customising
he must have been customising
we must have been customising
you must have been customising
they must have been customising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't customise
you mustn't customise
he mustn't customise
we mustn't customise
you mustn't customise
they mustn't customise 	I mustn't be customising
you mustn't be customising
he mustn't be customising
we mustn't be customising
you mustn't be customising
they mustn't be customising	I mustn't have customised
you mustn't have customised
he mustn't have customised
we mustn't have customised
you mustn't have customised
they mustn't have customised	I mustn't have been customising
you mustn't have been customising
he mustn't have been customising
we mustn't have been customising
you mustn't have been customising
they mustn't have been customising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I customise?
must you customise?
must he customise?
must we customise?
must you customise?
must they customise? 	must I be customising?
must you be customising?
must he be customising?
must we be customising?
must you be customising?
must they be customising? 	must I have customised?
must you have customised?
must he have customised?
must we have customised?
must you have customised?
must they have customised? 	must I have been customising?
must you have been customising?
must he have been customising?
must we have been customising?
must you have been customising?
must they have been customising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I customise?
mustn't you customise?
mustn't he customise?
mustn't we customise?
mustn't you customise?
mustn't they customise? 	mustn't I be customising?
mustn't you be customising?
mustn't he be customising?
mustn't we be customising?
mustn't you be customising?
mustn't they be customising? 	mustn't I have customised?
mustn't you have customised?
mustn't he have customised?
mustn't we have customised?
mustn't you have customised?
mustn't they have customised? 	mustn't I have been customising?
mustn't you have been customising?
mustn't he have been customising?
mustn't we have been customising?
mustn't you have been customising?
mustn't they have been customising?