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 may not pierce you may not pierce he may not pierce we may not pierce you may not pierce they may not pierce
V-ing form
I may not be piercing you may not be piercing he may not be piercing we may not be piercing you may not be piercing they may not be piercing
Perfect
I may not have pierced you may not have pierced he may not have pierced we may not have pierced you may not have pierced they may not have pierced
V-ing perfect
I may not have been piercing you may not have been piercing he may not have been piercing we may not have been piercing you may not have been piercing they may not 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
may I not pierce? may you not pierce? may he not pierce? may we not pierce? may you not pierce? may they not pierce?
V-ing form
may I not be piercing? may you not be piercing? may he not be piercing? may we not be piercing? may you not be piercing? may they not be piercing?
Perfect
may I not have pierced? may you not have pierced? may he not have pierced? may we not have pierced? may you not have pierced? may they not have pierced?
V-ing perfect
may I not have been piercing? may you not have been piercing? may he not have been piercing? may we not have been piercing? may you not have been piercing? may they not have been piercing?