must burden
Verbo regular: burden - burdened- burdened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must burden
you must burden
he must burden
we must burden
you must burden
they must burden 	I must be burdening
you must be burdening
he must be burdening
we must be burdening
you must be burdening
they must be burdening	I must have burdened
you must have burdened
he must have burdened
we must have burdened
you must have burdened
they must have burdened	I must have been burdening
you must have been burdening
he must have been burdening
we must have been burdening
you must have been burdening
they must have been burdening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't burden
you mustn't burden
he mustn't burden
we mustn't burden
you mustn't burden
they mustn't burden 	I mustn't be burdening
you mustn't be burdening
he mustn't be burdening
we mustn't be burdening
you mustn't be burdening
they mustn't be burdening	I mustn't have burdened
you mustn't have burdened
he mustn't have burdened
we mustn't have burdened
you mustn't have burdened
they mustn't have burdened	I mustn't have been burdening
you mustn't have been burdening
he mustn't have been burdening
we mustn't have been burdening
you mustn't have been burdening
they mustn't have been burdening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I burden?
must you burden?
must he burden?
must we burden?
must you burden?
must they burden? 	must I be burdening?
must you be burdening?
must he be burdening?
must we be burdening?
must you be burdening?
must they be burdening? 	must I have burdened?
must you have burdened?
must he have burdened?
must we have burdened?
must you have burdened?
must they have burdened? 	must I have been burdening?
must you have been burdening?
must he have been burdening?
must we have been burdening?
must you have been burdening?
must they have been burdening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I burden?
mustn't you burden?
mustn't he burden?
mustn't we burden?
mustn't you burden?
mustn't they burden? 	mustn't I be burdening?
mustn't you be burdening?
mustn't he be burdening?
mustn't we be burdening?
mustn't you be burdening?
mustn't they be burdening? 	mustn't I have burdened?
mustn't you have burdened?
mustn't he have burdened?
mustn't we have burdened?
mustn't you have burdened?
mustn't they have burdened? 	mustn't I have been burdening?
mustn't you have been burdening?
mustn't he have been burdening?
mustn't we have been burdening?
mustn't you have been burdening?
mustn't they have been burdening?