must deem
Regular verb: deem - deemed- deemed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must deem
you must deem
she must deem
we must deem
you must deem
they must deem 	I must be deeming
you must be deeming
she must be deeming
we must be deeming
you must be deeming
they must be deeming	I must have deemed
you must have deemed
she must have deemed
we must have deemed
you must have deemed
they must have deemed	I must have been deeming
you must have been deeming
she must have been deeming
we must have been deeming
you must have been deeming
they must have been deeming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't deem
you mustn't deem
she mustn't deem
we mustn't deem
you mustn't deem
they mustn't deem 	I mustn't be deeming
you mustn't be deeming
she mustn't be deeming
we mustn't be deeming
you mustn't be deeming
they mustn't be deeming	I mustn't have deemed
you mustn't have deemed
she mustn't have deemed
we mustn't have deemed
you mustn't have deemed
they mustn't have deemed	I mustn't have been deeming
you mustn't have been deeming
she mustn't have been deeming
we mustn't have been deeming
you mustn't have been deeming
they mustn't have been deeming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I deem?
must you deem?
must she deem?
must we deem?
must you deem?
must they deem? 	must I be deeming?
must you be deeming?
must she be deeming?
must we be deeming?
must you be deeming?
must they be deeming? 	must I have deemed?
must you have deemed?
must she have deemed?
must we have deemed?
must you have deemed?
must they have deemed? 	must I have been deeming?
must you have been deeming?
must she have been deeming?
must we have been deeming?
must you have been deeming?
must they have been deeming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I deem?
mustn't you deem?
mustn't she deem?
mustn't we deem?
mustn't you deem?
mustn't they deem? 	mustn't I be deeming?
mustn't you be deeming?
mustn't she be deeming?
mustn't we be deeming?
mustn't you be deeming?
mustn't they be deeming? 	mustn't I have deemed?
mustn't you have deemed?
mustn't she have deemed?
mustn't we have deemed?
mustn't you have deemed?
mustn't they have deemed? 	mustn't I have been deeming?
mustn't you have been deeming?
mustn't she have been deeming?
mustn't we have been deeming?
mustn't you have been deeming?
mustn't they have been deeming?