must marvel
Regular verb: marvel - marvelled- marvelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must marvel
you must marvel
he must marvel
we must marvel
you must marvel
they must marvel 	I must be marvelling
you must be marvelling
he must be marvelling
we must be marvelling
you must be marvelling
they must be marvelling	I must have marvelled
you must have marvelled
he must have marvelled
we must have marvelled
you must have marvelled
they must have marvelled	I must have been marvelling
you must have been marvelling
he must have been marvelling
we must have been marvelling
you must have been marvelling
they must have been marvelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not marvel
you must not marvel
he must not marvel
we must not marvel
you must not marvel
they must not marvel 	I must not be marvelling
you must not be marvelling
he must not be marvelling
we must not be marvelling
you must not be marvelling
they must not be marvelling	I must not have marvelled
you must not have marvelled
he must not have marvelled
we must not have marvelled
you must not have marvelled
they must not have marvelled	I must not have been marvelling
you must not have been marvelling
he must not have been marvelling
we must not have been marvelling
you must not have been marvelling
they must not have been marvelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I marvel?
must you marvel?
must he marvel?
must we marvel?
must you marvel?
must they marvel? 	must I be marvelling?
must you be marvelling?
must he be marvelling?
must we be marvelling?
must you be marvelling?
must they be marvelling? 	must I have marvelled?
must you have marvelled?
must he have marvelled?
must we have marvelled?
must you have marvelled?
must they have marvelled? 	must I have been marvelling?
must you have been marvelling?
must he have been marvelling?
must we have been marvelling?
must you have been marvelling?
must they have been marvelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not marvel?
must you not marvel?
must he not marvel?
must we not marvel?
must you not marvel?
must they not marvel? 	must I not be marvelling?
must you not be marvelling?
must he not be marvelling?
must we not be marvelling?
must you not be marvelling?
must they not be marvelling? 	must I not have marvelled?
must you not have marvelled?
must he not have marvelled?
must we not have marvelled?
must you not have marvelled?
must they not have marvelled? 	must I not have been marvelling?
must you not have been marvelling?
must he not have been marvelling?
must we not have been marvelling?
must you not have been marvelling?
must they not have been marvelling?