could callus
Verbo regular: callus - callused- callused

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could callus
you could callus
she could callus
we could callus
you could callus
they could callus 	I could be callusing
you could be callusing
she could be callusing
we could be callusing
you could be callusing
they could be callusing	I could have callused
you could have callused
she could have callused
we could have callused
you could have callused
they could have callused	I could have been callusing
you could have been callusing
she could have been callusing
we could have been callusing
you could have been callusing
they could have been callusing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not callus
you could not callus
she could not callus
we could not callus
you could not callus
they could not callus 	I could not be callusing
you could not be callusing
she could not be callusing
we could not be callusing
you could not be callusing
they could not be callusing	I could not have callused
you could not have callused
she could not have callused
we could not have callused
you could not have callused
they could not have callused	I could not have been callusing
you could not have been callusing
she could not have been callusing
we could not have been callusing
you could not have been callusing
they could not have been callusing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I callus?
could you callus?
could she callus?
could we callus?
could you callus?
could they callus? 	could I be callusing?
could you be callusing?
could she be callusing?
could we be callusing?
could you be callusing?
could they be callusing? 	could I have callused?
could you have callused?
could she have callused?
could we have callused?
could you have callused?
could they have callused? 	could I have been callusing?
could you have been callusing?
could she have been callusing?
could we have been callusing?
could you have been callusing?
could they have been callusing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not callus?
could you not callus?
could she not callus?
could we not callus?
could you not callus?
could they not callus? 	could I not be callusing?
could you not be callusing?
could she not be callusing?
could we not be callusing?
could you not be callusing?
could they not be callusing? 	could I not have callused?
could you not have callused?
could she not have callused?
could we not have callused?
could you not have callused?
could they not have callused? 	could I not have been callusing?
could you not have been callusing?
could she not have been callusing?
could we not have been callusing?
could you not have been callusing?
could they not have been callusing?