must snuff
Verbo regular: snuff - snuffed- snuffed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must snuff
you must snuff
he must snuff
we must snuff
you must snuff
they must snuff 	I must be snuffing
you must be snuffing
he must be snuffing
we must be snuffing
you must be snuffing
they must be snuffing	I must have snuffed
you must have snuffed
he must have snuffed
we must have snuffed
you must have snuffed
they must have snuffed	I must have been snuffing
you must have been snuffing
he must have been snuffing
we must have been snuffing
you must have been snuffing
they must have been snuffing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not snuff
you must not snuff
he must not snuff
we must not snuff
you must not snuff
they must not snuff 	I must not be snuffing
you must not be snuffing
he must not be snuffing
we must not be snuffing
you must not be snuffing
they must not be snuffing	I must not have snuffed
you must not have snuffed
he must not have snuffed
we must not have snuffed
you must not have snuffed
they must not have snuffed	I must not have been snuffing
you must not have been snuffing
he must not have been snuffing
we must not have been snuffing
you must not have been snuffing
they must not have been snuffing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I snuff?
must you snuff?
must he snuff?
must we snuff?
must you snuff?
must they snuff? 	must I be snuffing?
must you be snuffing?
must he be snuffing?
must we be snuffing?
must you be snuffing?
must they be snuffing? 	must I have snuffed?
must you have snuffed?
must he have snuffed?
must we have snuffed?
must you have snuffed?
must they have snuffed? 	must I have been snuffing?
must you have been snuffing?
must he have been snuffing?
must we have been snuffing?
must you have been snuffing?
must they have been snuffing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not snuff?
must you not snuff?
must he not snuff?
must we not snuff?
must you not snuff?
must they not snuff? 	must I not be snuffing?
must you not be snuffing?
must he not be snuffing?
must we not be snuffing?
must you not be snuffing?
must they not be snuffing? 	must I not have snuffed?
must you not have snuffed?
must he not have snuffed?
must we not have snuffed?
must you not have snuffed?
must they not have snuffed? 	must I not have been snuffing?
must you not have been snuffing?
must he not have been snuffing?
must we not have been snuffing?
must you not have been snuffing?
must they not have been snuffing?