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