must snuff
Regular verb: snuff - snuffed- snuffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must snuff
you must snuff
she must snuff
we must snuff
you must snuff
they must snuff 	I must be snuffing
you must be snuffing
she must be snuffing
we must be snuffing
you must be snuffing
they must be snuffing	I must have snuffed
you must have snuffed
she 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
she must have been snuffing
we must have been snuffing
you must have been snuffing
they must have been snuffing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not snuff
you must not snuff
she 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
she 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
she 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
she must not have been snuffing
we must not have been snuffing
you must not have been snuffing
they must not have been snuffing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I snuff?
must you snuff?
must she snuff?
must we snuff?
must you snuff?
must they snuff? 	must I be snuffing?
must you be snuffing?
must she be snuffing?
must we be snuffing?
must you be snuffing?
must they be snuffing? 	must I have snuffed?
must you have snuffed?
must she 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 she have been snuffing?
must we have been snuffing?
must you have been snuffing?
must they have been snuffing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not snuff?
must you not snuff?
must she 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 she 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 she 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 she not have been snuffing?
must we not have been snuffing?
must you not have been snuffing?
must they not have been snuffing?