can calve
Regular verb: calve - calved- calved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can calve
you can calve
she can calve
we can calve
you can calve
they can calve 	I can be calving
you can be calving
she can be calving
we can be calving
you can be calving
they can be calving	I can have calved
you can have calved
she can have calved
we can have calved
you can have calved
they can have calved	I can have been calving
you can have been calving
she can have been calving
we can have been calving
you can have been calving
they can have been calving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot calve
you cannot calve
she cannot calve
we cannot calve
you cannot calve
they cannot calve 	I cannot be calving
you cannot be calving
she cannot be calving
we cannot be calving
you cannot be calving
they cannot be calving	I cannot have calved
you cannot have calved
she cannot have calved
we cannot have calved
you cannot have calved
they cannot have calved	I cannot have been calving
you cannot have been calving
she cannot have been calving
we cannot have been calving
you cannot have been calving
they cannot have been calving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I calve?
can you calve?
can she calve?
can we calve?
can you calve?
can they calve? 	can I be calving?
can you be calving?
can she be calving?
can we be calving?
can you be calving?
can they be calving? 	can I have calved?
can you have calved?
can she have calved?
can we have calved?
can you have calved?
can they have calved? 	can I have been calving?
can you have been calving?
can she have been calving?
can we have been calving?
can you have been calving?
can they have been calving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not calve?
can you not calve?
can she not calve?
can we not calve?
can you not calve?
can they not calve? 	can I not be calving?
can you not be calving?
can she not be calving?
can we not be calving?
can you not be calving?
can they not be calving? 	can I not have calved?
can you not have calved?
can she not have calved?
can we not have calved?
can you not have calved?
can they not have calved? 	can I not have been calving?
can you not have been calving?
can she not have been calving?
can we not have been calving?
can you not have been calving?
can they not have been calving?