must extenuate
Regular verb: extenuate - extenuated- extenuated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must extenuate
you must extenuate
he must extenuate
we must extenuate
you must extenuate
they must extenuate 	I must be extenuating
you must be extenuating
he must be extenuating
we must be extenuating
you must be extenuating
they must be extenuating	I must have extenuated
you must have extenuated
he must have extenuated
we must have extenuated
you must have extenuated
they must have extenuated	I must have been extenuating
you must have been extenuating
he must have been extenuating
we must have been extenuating
you must have been extenuating
they must have been extenuating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't extenuate
you mustn't extenuate
he mustn't extenuate
we mustn't extenuate
you mustn't extenuate
they mustn't extenuate 	I mustn't be extenuating
you mustn't be extenuating
he mustn't be extenuating
we mustn't be extenuating
you mustn't be extenuating
they mustn't be extenuating	I mustn't have extenuated
you mustn't have extenuated
he mustn't have extenuated
we mustn't have extenuated
you mustn't have extenuated
they mustn't have extenuated	I mustn't have been extenuating
you mustn't have been extenuating
he mustn't have been extenuating
we mustn't have been extenuating
you mustn't have been extenuating
they mustn't have been extenuating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I extenuate?
must you extenuate?
must he extenuate?
must we extenuate?
must you extenuate?
must they extenuate? 	must I be extenuating?
must you be extenuating?
must he be extenuating?
must we be extenuating?
must you be extenuating?
must they be extenuating? 	must I have extenuated?
must you have extenuated?
must he have extenuated?
must we have extenuated?
must you have extenuated?
must they have extenuated? 	must I have been extenuating?
must you have been extenuating?
must he have been extenuating?
must we have been extenuating?
must you have been extenuating?
must they have been extenuating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I extenuate?
mustn't you extenuate?
mustn't he extenuate?
mustn't we extenuate?
mustn't you extenuate?
mustn't they extenuate? 	mustn't I be extenuating?
mustn't you be extenuating?
mustn't he be extenuating?
mustn't we be extenuating?
mustn't you be extenuating?
mustn't they be extenuating? 	mustn't I have extenuated?
mustn't you have extenuated?
mustn't he have extenuated?
mustn't we have extenuated?
mustn't you have extenuated?
mustn't they have extenuated? 	mustn't I have been extenuating?
mustn't you have been extenuating?
mustn't he have been extenuating?
mustn't we have been extenuating?
mustn't you have been extenuating?
mustn't they have been extenuating?