must characterise
Regular verb: characterise - characterised- characterised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must characterise
you must characterise
she must characterise
we must characterise
you must characterise
they must characterise 	I must be characterising
you must be characterising
she must be characterising
we must be characterising
you must be characterising
they must be characterising	I must have characterised
you must have characterised
she must have characterised
we must have characterised
you must have characterised
they must have characterised	I must have been characterising
you must have been characterising
she must have been characterising
we must have been characterising
you must have been characterising
they must have been characterising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't characterise
you mustn't characterise
she mustn't characterise
we mustn't characterise
you mustn't characterise
they mustn't characterise 	I mustn't be characterising
you mustn't be characterising
she mustn't be characterising
we mustn't be characterising
you mustn't be characterising
they mustn't be characterising	I mustn't have characterised
you mustn't have characterised
she mustn't have characterised
we mustn't have characterised
you mustn't have characterised
they mustn't have characterised	I mustn't have been characterising
you mustn't have been characterising
she mustn't have been characterising
we mustn't have been characterising
you mustn't have been characterising
they mustn't have been characterising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I characterise?
must you characterise?
must she characterise?
must we characterise?
must you characterise?
must they characterise? 	must I be characterising?
must you be characterising?
must she be characterising?
must we be characterising?
must you be characterising?
must they be characterising? 	must I have characterised?
must you have characterised?
must she have characterised?
must we have characterised?
must you have characterised?
must they have characterised? 	must I have been characterising?
must you have been characterising?
must she have been characterising?
must we have been characterising?
must you have been characterising?
must they have been characterising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I characterise?
mustn't you characterise?
mustn't she characterise?
mustn't we characterise?
mustn't you characterise?
mustn't they characterise? 	mustn't I be characterising?
mustn't you be characterising?
mustn't she be characterising?
mustn't we be characterising?
mustn't you be characterising?
mustn't they be characterising? 	mustn't I have characterised?
mustn't you have characterised?
mustn't she have characterised?
mustn't we have characterised?
mustn't you have characterised?
mustn't they have characterised? 	mustn't I have been characterising?
mustn't you have been characterising?
mustn't she have been characterising?
mustn't we have been characterising?
mustn't you have been characterising?
mustn't they have been characterising?