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 may not callus
you may not callus
he may not callus
we may not callus
you may not callus
they may not callus 	I may not be callusing
you may not be callusing
he may not be callusing
we may not be callusing
you may not be callusing
they may not be callusing	I may not have callused
you may not have callused
he may not have callused
we may not have callused
you may not have callused
they may not have callused	I may not have been callusing
you may not have been callusing
he may not have been callusing
we may not have been callusing
you may not have been callusing
they may not 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 	
may I not callus?
may you not callus?
may he not callus?
may we not callus?
may you not callus?
may they not callus? 	may I not be callusing?
may you not be callusing?
may he not be callusing?
may we not be callusing?
may you not be callusing?
may they not be callusing? 	may I not have callused?
may you not have callused?
may he not have callused?
may we not have callused?
may you not have callused?
may they not have callused? 	may I not have been callusing?
may you not have been callusing?
may he not have been callusing?
may we not have been callusing?
may you not have been callusing?
may they not have been callusing?