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