must devolve
Regular verb: devolve - devolved- devolved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must devolve
you must devolve
he must devolve
we must devolve
you must devolve
they must devolve 	I must be devolving
you must be devolving
he must be devolving
we must be devolving
you must be devolving
they must be devolving	I must have devolved
you must have devolved
he must have devolved
we must have devolved
you must have devolved
they must have devolved	I must have been devolving
you must have been devolving
he must have been devolving
we must have been devolving
you must have been devolving
they must have been devolving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not devolve
you must not devolve
he must not devolve
we must not devolve
you must not devolve
they must not devolve 	I must not be devolving
you must not be devolving
he must not be devolving
we must not be devolving
you must not be devolving
they must not be devolving	I must not have devolved
you must not have devolved
he must not have devolved
we must not have devolved
you must not have devolved
they must not have devolved	I must not have been devolving
you must not have been devolving
he must not have been devolving
we must not have been devolving
you must not have been devolving
they must not have been devolving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I devolve?
must you devolve?
must he devolve?
must we devolve?
must you devolve?
must they devolve? 	must I be devolving?
must you be devolving?
must he be devolving?
must we be devolving?
must you be devolving?
must they be devolving? 	must I have devolved?
must you have devolved?
must he have devolved?
must we have devolved?
must you have devolved?
must they have devolved? 	must I have been devolving?
must you have been devolving?
must he have been devolving?
must we have been devolving?
must you have been devolving?
must they have been devolving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not devolve?
must you not devolve?
must he not devolve?
must we not devolve?
must you not devolve?
must they not devolve? 	must I not be devolving?
must you not be devolving?
must he not be devolving?
must we not be devolving?
must you not be devolving?
must they not be devolving? 	must I not have devolved?
must you not have devolved?
must he not have devolved?
must we not have devolved?
must you not have devolved?
must they not have devolved? 	must I not have been devolving?
must you not have been devolving?
must he not have been devolving?
must we not have been devolving?
must you not have been devolving?
must they not have been devolving?