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 must not extenuate
you must not extenuate
he must not extenuate
we must not extenuate
you must not extenuate
they must not extenuate 	I must not be extenuating
you must not be extenuating
he must not be extenuating
we must not be extenuating
you must not be extenuating
they must not be extenuating	I must not have extenuated
you must not have extenuated
he must not have extenuated
we must not have extenuated
you must not have extenuated
they must not have extenuated	I must not have been extenuating
you must not have been extenuating
he must not have been extenuating
we must not have been extenuating
you must not have been extenuating
they must not 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 	
must I not extenuate?
must you not extenuate?
must he not extenuate?
must we not extenuate?
must you not extenuate?
must they not extenuate? 	must I not be extenuating?
must you not be extenuating?
must he not be extenuating?
must we not be extenuating?
must you not be extenuating?
must they not be extenuating? 	must I not have extenuated?
must you not have extenuated?
must he not have extenuated?
must we not have extenuated?
must you not have extenuated?
must they not have extenuated? 	must I not have been extenuating?
must you not have been extenuating?
must he not have been extenuating?
must we not have been extenuating?
must you not have been extenuating?
must they not have been extenuating?