I may sniff you may sniff he may sniff we may sniff you may sniff they may sniff
V-ing form
I may be sniffing you may be sniffing he may be sniffing we may be sniffing you may be sniffing they may be sniffing
Perfect
I may have sniffed you may have sniffed he may have sniffed we may have sniffed you may have sniffed they may have sniffed
V-ing perfect
I may have been sniffing you may have been sniffing he may have been sniffing we may have been sniffing you may have been sniffing they may have been sniffing
Negation
Simple form
I may not sniff you may not sniff he may not sniff we may not sniff you may not sniff they may not sniff
V-ing form
I may not be sniffing you may not be sniffing he may not be sniffing we may not be sniffing you may not be sniffing they may not be sniffing
Perfect
I may not have sniffed you may not have sniffed he may not have sniffed we may not have sniffed you may not have sniffed they may not have sniffed
V-ing perfect
I may not have been sniffing you may not have been sniffing he may not have been sniffing we may not have been sniffing you may not have been sniffing they may not have been sniffing
Interrogative form
Simple form
may I sniff? may you sniff? may he sniff? may we sniff? may you sniff? may they sniff?
V-ing form
may I be sniffing? may you be sniffing? may he be sniffing? may we be sniffing? may you be sniffing? may they be sniffing?
Perfect
may I have sniffed? may you have sniffed? may he have sniffed? may we have sniffed? may you have sniffed? may they have sniffed?
V-ing perfect
may I have been sniffing? may you have been sniffing? may he have been sniffing? may we have been sniffing? may you have been sniffing? may they have been sniffing?
Interro-negative form
Simple form
may I not sniff? may you not sniff? may he not sniff? may we not sniff? may you not sniff? may they not sniff?
V-ing form
may I not be sniffing? may you not be sniffing? may he not be sniffing? may we not be sniffing? may you not be sniffing? may they not be sniffing?
Perfect
may I not have sniffed? may you not have sniffed? may he not have sniffed? may we not have sniffed? may you not have sniffed? may they not have sniffed?
V-ing perfect
may I not have been sniffing? may you not have been sniffing? may he not have been sniffing? may we not have been sniffing? may you not have been sniffing? may they not have been sniffing?