must breathe
Verbo regular: breathe - breathed- breathed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must breathe
you must breathe
she must breathe
we must breathe
you must breathe
they must breathe 	I must be breathing
you must be breathing
she must be breathing
we must be breathing
you must be breathing
they must be breathing	I must have breathed
you must have breathed
she must have breathed
we must have breathed
you must have breathed
they must have breathed	I must have been breathing
you must have been breathing
she must have been breathing
we must have been breathing
you must have been breathing
they must have been breathing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't breathe
you mustn't breathe
she mustn't breathe
we mustn't breathe
you mustn't breathe
they mustn't breathe 	I mustn't be breathing
you mustn't be breathing
she mustn't be breathing
we mustn't be breathing
you mustn't be breathing
they mustn't be breathing	I mustn't have breathed
you mustn't have breathed
she mustn't have breathed
we mustn't have breathed
you mustn't have breathed
they mustn't have breathed	I mustn't have been breathing
you mustn't have been breathing
she mustn't have been breathing
we mustn't have been breathing
you mustn't have been breathing
they mustn't have been breathing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I breathe?
must you breathe?
must she breathe?
must we breathe?
must you breathe?
must they breathe? 	must I be breathing?
must you be breathing?
must she be breathing?
must we be breathing?
must you be breathing?
must they be breathing? 	must I have breathed?
must you have breathed?
must she have breathed?
must we have breathed?
must you have breathed?
must they have breathed? 	must I have been breathing?
must you have been breathing?
must she have been breathing?
must we have been breathing?
must you have been breathing?
must they have been breathing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I breathe?
mustn't you breathe?
mustn't she breathe?
mustn't we breathe?
mustn't you breathe?
mustn't they breathe? 	mustn't I be breathing?
mustn't you be breathing?
mustn't she be breathing?
mustn't we be breathing?
mustn't you be breathing?
mustn't they be breathing? 	mustn't I have breathed?
mustn't you have breathed?
mustn't she have breathed?
mustn't we have breathed?
mustn't you have breathed?
mustn't they have breathed? 	mustn't I have been breathing?
mustn't you have been breathing?
mustn't she have been breathing?
mustn't we have been breathing?
mustn't you have been breathing?
mustn't they have been breathing?