must debase
Regular verb: debase - debased- debased

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must debase
you must debase
she must debase
we must debase
you must debase
they must debase 	I must be debasing
you must be debasing
she must be debasing
we must be debasing
you must be debasing
they must be debasing	I must have debased
you must have debased
she must have debased
we must have debased
you must have debased
they must have debased	I must have been debasing
you must have been debasing
she must have been debasing
we must have been debasing
you must have been debasing
they must have been debasing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't debase
you mustn't debase
she mustn't debase
we mustn't debase
you mustn't debase
they mustn't debase 	I mustn't be debasing
you mustn't be debasing
she mustn't be debasing
we mustn't be debasing
you mustn't be debasing
they mustn't be debasing	I mustn't have debased
you mustn't have debased
she mustn't have debased
we mustn't have debased
you mustn't have debased
they mustn't have debased	I mustn't have been debasing
you mustn't have been debasing
she mustn't have been debasing
we mustn't have been debasing
you mustn't have been debasing
they mustn't have been debasing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I debase?
must you debase?
must she debase?
must we debase?
must you debase?
must they debase? 	must I be debasing?
must you be debasing?
must she be debasing?
must we be debasing?
must you be debasing?
must they be debasing? 	must I have debased?
must you have debased?
must she have debased?
must we have debased?
must you have debased?
must they have debased? 	must I have been debasing?
must you have been debasing?
must she have been debasing?
must we have been debasing?
must you have been debasing?
must they have been debasing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I debase?
mustn't you debase?
mustn't she debase?
mustn't we debase?
mustn't you debase?
mustn't they debase? 	mustn't I be debasing?
mustn't you be debasing?
mustn't she be debasing?
mustn't we be debasing?
mustn't you be debasing?
mustn't they be debasing? 	mustn't I have debased?
mustn't you have debased?
mustn't she have debased?
mustn't we have debased?
mustn't you have debased?
mustn't they have debased? 	mustn't I have been debasing?
mustn't you have been debasing?
mustn't she have been debasing?
mustn't we have been debasing?
mustn't you have been debasing?
mustn't they have been debasing?