must drum
Verbo regular: drum - drummed- drummed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must drum
you must drum
he must drum
we must drum
you must drum
they must drum 	I must be drumming
you must be drumming
he must be drumming
we must be drumming
you must be drumming
they must be drumming	I must have drummed
you must have drummed
he must have drummed
we must have drummed
you must have drummed
they must have drummed	I must have been drumming
you must have been drumming
he must have been drumming
we must have been drumming
you must have been drumming
they must have been drumming	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't drum
you mustn't drum
he mustn't drum
we mustn't drum
you mustn't drum
they mustn't drum 	I mustn't be drumming
you mustn't be drumming
he mustn't be drumming
we mustn't be drumming
you mustn't be drumming
they mustn't be drumming	I mustn't have drummed
you mustn't have drummed
he mustn't have drummed
we mustn't have drummed
you mustn't have drummed
they mustn't have drummed	I mustn't have been drumming
you mustn't have been drumming
he mustn't have been drumming
we mustn't have been drumming
you mustn't have been drumming
they mustn't have been drumming	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I drum?
must you drum?
must he drum?
must we drum?
must you drum?
must they drum? 	must I be drumming?
must you be drumming?
must he be drumming?
must we be drumming?
must you be drumming?
must they be drumming? 	must I have drummed?
must you have drummed?
must he have drummed?
must we have drummed?
must you have drummed?
must they have drummed? 	must I have been drumming?
must you have been drumming?
must he have been drumming?
must we have been drumming?
must you have been drumming?
must they have been drumming? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I drum?
mustn't you drum?
mustn't he drum?
mustn't we drum?
mustn't you drum?
mustn't they drum? 	mustn't I be drumming?
mustn't you be drumming?
mustn't he be drumming?
mustn't we be drumming?
mustn't you be drumming?
mustn't they be drumming? 	mustn't I have drummed?
mustn't you have drummed?
mustn't he have drummed?
mustn't we have drummed?
mustn't you have drummed?
mustn't they have drummed? 	mustn't I have been drumming?
mustn't you have been drumming?
mustn't he have been drumming?
mustn't we have been drumming?
mustn't you have been drumming?
mustn't they have been drumming?