must valve
Regular verb: valve - valved- valved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must valve
you must valve
she must valve
we must valve
you must valve
they must valve 	I must be valving
you must be valving
she must be valving
we must be valving
you must be valving
they must be valving	I must have valved
you must have valved
she must have valved
we must have valved
you must have valved
they must have valved	I must have been valving
you must have been valving
she must have been valving
we must have been valving
you must have been valving
they must have been valving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't valve
you mustn't valve
she mustn't valve
we mustn't valve
you mustn't valve
they mustn't valve 	I mustn't be valving
you mustn't be valving
she mustn't be valving
we mustn't be valving
you mustn't be valving
they mustn't be valving	I mustn't have valved
you mustn't have valved
she mustn't have valved
we mustn't have valved
you mustn't have valved
they mustn't have valved	I mustn't have been valving
you mustn't have been valving
she mustn't have been valving
we mustn't have been valving
you mustn't have been valving
they mustn't have been valving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I valve?
must you valve?
must she valve?
must we valve?
must you valve?
must they valve? 	must I be valving?
must you be valving?
must she be valving?
must we be valving?
must you be valving?
must they be valving? 	must I have valved?
must you have valved?
must she have valved?
must we have valved?
must you have valved?
must they have valved? 	must I have been valving?
must you have been valving?
must she have been valving?
must we have been valving?
must you have been valving?
must they have been valving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I valve?
mustn't you valve?
mustn't she valve?
mustn't we valve?
mustn't you valve?
mustn't they valve? 	mustn't I be valving?
mustn't you be valving?
mustn't she be valving?
mustn't we be valving?
mustn't you be valving?
mustn't they be valving? 	mustn't I have valved?
mustn't you have valved?
mustn't she have valved?
mustn't we have valved?
mustn't you have valved?
mustn't they have valved? 	mustn't I have been valving?
mustn't you have been valving?
mustn't she have been valving?
mustn't we have been valving?
mustn't you have been valving?
mustn't they have been valving?