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 must not customise
you must not customise
he must not customise
we must not customise
you must not customise
they must not customise 	I must not be customising
you must not be customising
he must not be customising
we must not be customising
you must not be customising
they must not be customising	I must not have customised
you must not have customised
he must not have customised
we must not have customised
you must not have customised
they must not have customised	I must not have been customising
you must not have been customising
he must not have been customising
we must not have been customising
you must not have been customising
they must not 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 	
must I not customise?
must you not customise?
must he not customise?
must we not customise?
must you not customise?
must they not customise? 	must I not be customising?
must you not be customising?
must he not be customising?
must we not be customising?
must you not be customising?
must they not be customising? 	must I not have customised?
must you not have customised?
must he not have customised?
must we not have customised?
must you not have customised?
must they not have customised? 	must I not have been customising?
must you not have been customising?
must he not have been customising?
must we not have been customising?
must you not have been customising?
must they not have been customising?