I may snowboard you may snowboard he may snowboard we may snowboard you may snowboard they may snowboard
V-ing form
I may be snowboarding you may be snowboarding he may be snowboarding we may be snowboarding you may be snowboarding they may be snowboarding
Perfect
I may have snowboarded you may have snowboarded he may have snowboarded we may have snowboarded you may have snowboarded they may have snowboarded
V-ing perfect
I may have been snowboarding you may have been snowboarding he may have been snowboarding we may have been snowboarding you may have been snowboarding they may have been snowboarding
Negation
Simple form
I mayn't snowboard you mayn't snowboard he mayn't snowboard we mayn't snowboard you mayn't snowboard they mayn't snowboard
V-ing form
I mayn't be snowboarding you mayn't be snowboarding he mayn't be snowboarding we mayn't be snowboarding you mayn't be snowboarding they mayn't be snowboarding
Perfect
I mayn't have snowboarded you mayn't have snowboarded he mayn't have snowboarded we mayn't have snowboarded you mayn't have snowboarded they mayn't have snowboarded
V-ing perfect
I mayn't have been snowboarding you mayn't have been snowboarding he mayn't have been snowboarding we mayn't have been snowboarding you mayn't have been snowboarding they mayn't have been snowboarding
Interrogative form
Simple form
may I snowboard? may you snowboard? may he snowboard? may we snowboard? may you snowboard? may they snowboard?
V-ing form
may I be snowboarding? may you be snowboarding? may he be snowboarding? may we be snowboarding? may you be snowboarding? may they be snowboarding?
Perfect
may I have snowboarded? may you have snowboarded? may he have snowboarded? may we have snowboarded? may you have snowboarded? may they have snowboarded?
V-ing perfect
may I have been snowboarding? may you have been snowboarding? may he have been snowboarding? may we have been snowboarding? may you have been snowboarding? may they have been snowboarding?
Interro-negative form
Simple form
mayn't I snowboard? mayn't you snowboard? mayn't he snowboard? mayn't we snowboard? mayn't you snowboard? mayn't they snowboard?
V-ing form
mayn't I be snowboarding? mayn't you be snowboarding? mayn't he be snowboarding? mayn't we be snowboarding? mayn't you be snowboarding? mayn't they be snowboarding?
Perfect
mayn't I have snowboarded? mayn't you have snowboarded? mayn't he have snowboarded? mayn't we have snowboarded? mayn't you have snowboarded? mayn't they have snowboarded?
V-ing perfect
mayn't I have been snowboarding? mayn't you have been snowboarding? mayn't he have been snowboarding? mayn't we have been snowboarding? mayn't you have been snowboarding? mayn't they have been snowboarding?