I may block you may block she may block we may block you may block they may block
V-ing form
I may be blocking you may be blocking she may be blocking we may be blocking you may be blocking they may be blocking
Perfect
I may have blocked you may have blocked she may have blocked we may have blocked you may have blocked they may have blocked
V-ing perfect
I may have been blocking you may have been blocking she may have been blocking we may have been blocking you may have been blocking they may have been blocking
Negation
Simple form
I may not block you may not block she may not block we may not block you may not block they may not block
V-ing form
I may not be blocking you may not be blocking she may not be blocking we may not be blocking you may not be blocking they may not be blocking
Perfect
I may not have blocked you may not have blocked she may not have blocked we may not have blocked you may not have blocked they may not have blocked
V-ing perfect
I may not have been blocking you may not have been blocking she may not have been blocking we may not have been blocking you may not have been blocking they may not have been blocking
Interrogative form
Simple form
may I block? may you block? may she block? may we block? may you block? may they block?
V-ing form
may I be blocking? may you be blocking? may she be blocking? may we be blocking? may you be blocking? may they be blocking?
Perfect
may I have blocked? may you have blocked? may she have blocked? may we have blocked? may you have blocked? may they have blocked?
V-ing perfect
may I have been blocking? may you have been blocking? may she have been blocking? may we have been blocking? may you have been blocking? may they have been blocking?
Interro-negative form
Simple form
may I not block? may you not block? may she not block? may we not block? may you not block? may they not block?
V-ing form
may I not be blocking? may you not be blocking? may she not be blocking? may we not be blocking? may you not be blocking? may they not be blocking?
Perfect
may I not have blocked? may you not have blocked? may she not have blocked? may we not have blocked? may you not have blocked? may they not have blocked?
V-ing perfect
may I not have been blocking? may you not have been blocking? may she not have been blocking? may we not have been blocking? may you not have been blocking? may they not have been blocking?