could heave
Irregular verb: heave - heaved, hove- heaved, hove

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could heave
you could heave
she could heave
we could heave
you could heave
they could heave 	I could be heaving
you could be heaving
she could be heaving
we could be heaving
you could be heaving
they could be heaving	I could have heaved, hove
you could have heaved, hove
she could have heaved, hove
we could have heaved, hove
you could have heaved, hove
they could have heaved, hove	I could have been heaving
you could have been heaving
she could have been heaving
we could have been heaving
you could have been heaving
they could have been heaving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not heave
you could not heave
she could not heave
we could not heave
you could not heave
they could not heave 	I could not be heaving
you could not be heaving
she could not be heaving
we could not be heaving
you could not be heaving
they could not be heaving	I could not have heaved, hove
you could not have heaved, hove
she could not have heaved, hove
we could not have heaved, hove
you could not have heaved, hove
they could not have heaved, hove	I could not have been heaving
you could not have been heaving
she could not have been heaving
we could not have been heaving
you could not have been heaving
they could not have been heaving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I heave?
could you heave?
could she heave?
could we heave?
could you heave?
could they heave? 	could I be heaving?
could you be heaving?
could she be heaving?
could we be heaving?
could you be heaving?
could they be heaving? 	could I have heaved, hove?
could you have heaved, hove?
could she have heaved, hove?
could we have heaved, hove?
could you have heaved, hove?
could they have heaved, hove? 	could I have been heaving?
could you have been heaving?
could she have been heaving?
could we have been heaving?
could you have been heaving?
could they have been heaving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not heave?
could you not heave?
could she not heave?
could we not heave?
could you not heave?
could they not heave? 	could I not be heaving?
could you not be heaving?
could she not be heaving?
could we not be heaving?
could you not be heaving?
could they not be heaving? 	could I not have heaved, hove?
could you not have heaved, hove?
could she not have heaved, hove?
could we not have heaved, hove?
could you not have heaved, hove?
could they not have heaved, hove? 	could I not have been heaving?
could you not have been heaving?
could she not have been heaving?
could we not have been heaving?
could you not have been heaving?
could they not have been heaving?