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