may sniff
Regular verb: sniff - sniffed- sniffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may sniff
you may sniff
she may sniff
we may sniff
you may sniff
they may sniff 	I may be sniffing
you may be sniffing
she may be sniffing
we may be sniffing
you may be sniffing
they may be sniffing	I may have sniffed
you may have sniffed
she may have sniffed
we may have sniffed
you may have sniffed
they may have sniffed	I may have been sniffing
you may have been sniffing
she may have been sniffing
we may have been sniffing
you may have been sniffing
they may have been sniffing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't sniff
you mayn't sniff
she mayn't sniff
we mayn't sniff
you mayn't sniff
they mayn't sniff 	I mayn't be sniffing
you mayn't be sniffing
she mayn't be sniffing
we mayn't be sniffing
you mayn't be sniffing
they mayn't be sniffing	I mayn't have sniffed
you mayn't have sniffed
she mayn't have sniffed
we mayn't have sniffed
you mayn't have sniffed
they mayn't have sniffed	I mayn't have been sniffing
you mayn't have been sniffing
she mayn't have been sniffing
we mayn't have been sniffing
you mayn't have been sniffing
they mayn't have been sniffing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I sniff?
may you sniff?
may she sniff?
may we sniff?
may you sniff?
may they sniff? 	may I be sniffing?
may you be sniffing?
may she be sniffing?
may we be sniffing?
may you be sniffing?
may they be sniffing? 	may I have sniffed?
may you have sniffed?
may she have sniffed?
may we have sniffed?
may you have sniffed?
may they have sniffed? 	may I have been sniffing?
may you have been sniffing?
may she have been sniffing?
may we have been sniffing?
may you have been sniffing?
may they have been sniffing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I sniff?
mayn't you sniff?
mayn't she sniff?
mayn't we sniff?
mayn't you sniff?
mayn't they sniff? 	mayn't I be sniffing?
mayn't you be sniffing?
mayn't she be sniffing?
mayn't we be sniffing?
mayn't you be sniffing?
mayn't they be sniffing? 	mayn't I have sniffed?
mayn't you have sniffed?
mayn't she have sniffed?
mayn't we have sniffed?
mayn't you have sniffed?
mayn't they have sniffed? 	mayn't I have been sniffing?
mayn't you have been sniffing?
mayn't she have been sniffing?
mayn't we have been sniffing?
mayn't you have been sniffing?
mayn't they have been sniffing?