I may nibble you may nibble she may nibble we may nibble you may nibble they may nibble
V-ing form
I may be nibbling you may be nibbling she may be nibbling we may be nibbling you may be nibbling they may be nibbling
Perfect
I may have nibbled you may have nibbled she may have nibbled we may have nibbled you may have nibbled they may have nibbled
V-ing perfect
I may have been nibbling you may have been nibbling she may have been nibbling we may have been nibbling you may have been nibbling they may have been nibbling
Negation
Simple form
I mayn't nibble you mayn't nibble she mayn't nibble we mayn't nibble you mayn't nibble they mayn't nibble
V-ing form
I mayn't be nibbling you mayn't be nibbling she mayn't be nibbling we mayn't be nibbling you mayn't be nibbling they mayn't be nibbling
Perfect
I mayn't have nibbled you mayn't have nibbled she mayn't have nibbled we mayn't have nibbled you mayn't have nibbled they mayn't have nibbled
V-ing perfect
I mayn't have been nibbling you mayn't have been nibbling she mayn't have been nibbling we mayn't have been nibbling you mayn't have been nibbling they mayn't have been nibbling
Interrogative form
Simple form
may I nibble? may you nibble? may she nibble? may we nibble? may you nibble? may they nibble?
V-ing form
may I be nibbling? may you be nibbling? may she be nibbling? may we be nibbling? may you be nibbling? may they be nibbling?
Perfect
may I have nibbled? may you have nibbled? may she have nibbled? may we have nibbled? may you have nibbled? may they have nibbled?
V-ing perfect
may I have been nibbling? may you have been nibbling? may she have been nibbling? may we have been nibbling? may you have been nibbling? may they have been nibbling?
Interro-negative form
Simple form
mayn't I nibble? mayn't you nibble? mayn't she nibble? mayn't we nibble? mayn't you nibble? mayn't they nibble?
V-ing form
mayn't I be nibbling? mayn't you be nibbling? mayn't she be nibbling? mayn't we be nibbling? mayn't you be nibbling? mayn't they be nibbling?
Perfect
mayn't I have nibbled? mayn't you have nibbled? mayn't she have nibbled? mayn't we have nibbled? mayn't you have nibbled? mayn't they have nibbled?
V-ing perfect
mayn't I have been nibbling? mayn't you have been nibbling? mayn't she have been nibbling? mayn't we have been nibbling? mayn't you have been nibbling? mayn't they have been nibbling?