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