English verb conjugation
CAN CALVE

Regular verb: calve - calved - calved

Affirmation

Simple form	V-ing form
I can calve you can calve he can calve we can calve you can calve they can calve	I can be calving you can be calving he can be calving we can be calving you can be calving they can be calving
Perfect	V-ing perfect
I can have calved you can have calved he 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 he 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
I can't calve you can't calve he can't calve we can't calve you can't calve they can't calve	I can't be calving you can't be calving he can't be calving we can't be calving you can't be calving they can't be calving
Perfect	V-ing perfect
I can't have calved you can't have calved he can't have calved we can't have calved you can't have calved they can't have calved	I can't have been calving you can't have been calving he can't have been calving we can't have been calving you can't have been calving they can't have been calving

Interrogative form

Simple form	V-ing form
can I calve? can you calve? can he calve? can we calve? can you calve? can they calve?	can I be calving? can you be calving? can he be calving? can we be calving? can you be calving? can they be calving?
Perfect	V-ing perfect
can I have calved? can you have calved? can he 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 he 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
can't I calve? can't you calve? can't he calve? can't we calve? can't you calve? can't they calve?	can't I be calving? can't you be calving? can't he be calving? can't we be calving? can't you be calving? can't they be calving?
Perfect	V-ing perfect
can't I have calved? can't you have calved? can't he have calved? can't we have calved? can't you have calved? can't they have calved?	can't I have been calving? can't you have been calving? can't he have been calving? can't we have been calving? can't you have been calving? can't they have been calving?