may callus
Regular verb: callus - callused- callused

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may callus
you may callus
he may callus
we may callus
you may callus
they may callus 	I may be callusing
you may be callusing
he may be callusing
we may be callusing
you may be callusing
they may be callusing	I may have callused
you may have callused
he may have callused
we may have callused
you may have callused
they may have callused	I may have been callusing
you may have been callusing
he may have been callusing
we may have been callusing
you may have been callusing
they may have been callusing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't callus
you mayn't callus
he mayn't callus
we mayn't callus
you mayn't callus
they mayn't callus 	I mayn't be callusing
you mayn't be callusing
he mayn't be callusing
we mayn't be callusing
you mayn't be callusing
they mayn't be callusing	I mayn't have callused
you mayn't have callused
he mayn't have callused
we mayn't have callused
you mayn't have callused
they mayn't have callused	I mayn't have been callusing
you mayn't have been callusing
he mayn't have been callusing
we mayn't have been callusing
you mayn't have been callusing
they mayn't have been callusing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I callus?
may you callus?
may he callus?
may we callus?
may you callus?
may they callus? 	may I be callusing?
may you be callusing?
may he be callusing?
may we be callusing?
may you be callusing?
may they be callusing? 	may I have callused?
may you have callused?
may he have callused?
may we have callused?
may you have callused?
may they have callused? 	may I have been callusing?
may you have been callusing?
may he have been callusing?
may we have been callusing?
may you have been callusing?
may they have been callusing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I callus?
mayn't you callus?
mayn't he callus?
mayn't we callus?
mayn't you callus?
mayn't they callus? 	mayn't I be callusing?
mayn't you be callusing?
mayn't he be callusing?
mayn't we be callusing?
mayn't you be callusing?
mayn't they be callusing? 	mayn't I have callused?
mayn't you have callused?
mayn't he have callused?
mayn't we have callused?
mayn't you have callused?
mayn't they have callused? 	mayn't I have been callusing?
mayn't you have been callusing?
mayn't he have been callusing?
mayn't we have been callusing?
mayn't you have been callusing?
mayn't they have been callusing?