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