English verb conjugation
CAN CALLUS

Regular verb: callus - callused - callused

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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