must characterise
Regular verb: characterise - characterised- characterised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must characterise
you must characterise
he must characterise
we must characterise
you must characterise
they must characterise 	I must be characterising
you must be characterising
he must be characterising
we must be characterising
you must be characterising
they must be characterising	I must have characterised
you must have characterised
he 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
he 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 must not characterise
you must not characterise
he must not characterise
we must not characterise
you must not characterise
they must not characterise 	I must not be characterising
you must not be characterising
he must not be characterising
we must not be characterising
you must not be characterising
they must not be characterising	I must not have characterised
you must not have characterised
he must not have characterised
we must not have characterised
you must not have characterised
they must not have characterised	I must not have been characterising
you must not have been characterising
he must not have been characterising
we must not have been characterising
you must not have been characterising
they must not have been characterising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I characterise?
must you characterise?
must he characterise?
must we characterise?
must you characterise?
must they characterise? 	must I be characterising?
must you be characterising?
must he be characterising?
must we be characterising?
must you be characterising?
must they be characterising? 	must I have characterised?
must you have characterised?
must he 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 he 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 	
must I not characterise?
must you not characterise?
must he not characterise?
must we not characterise?
must you not characterise?
must they not characterise? 	must I not be characterising?
must you not be characterising?
must he not be characterising?
must we not be characterising?
must you not be characterising?
must they not be characterising? 	must I not have characterised?
must you not have characterised?
must he not have characterised?
must we not have characterised?
must you not have characterised?
must they not have characterised? 	must I not have been characterising?
must you not have been characterising?
must he not have been characterising?
must we not have been characterising?
must you not have been characterising?
must they not have been characterising?