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