I can heave you can heave he can heave we can heave you can heave they can heave
V-ing form
I can be heaving you can be heaving he can be heaving we can be heaving you can be heaving they can be heaving
Perfect
I can have heaved, hove you can have heaved, hove he can have heaved, hove we can have heaved, hove you can have heaved, hove they can have heaved, hove
V-ing perfect
I can have been heaving you can have been heaving he can have been heaving we can have been heaving you can have been heaving they can have been heaving
Negation
Simple form
I can't heave you can't heave he can't heave we can't heave you can't heave they can't heave
V-ing form
I can't be heaving you can't be heaving he can't be heaving we can't be heaving you can't be heaving they can't be heaving
Perfect
I can't have heaved, hove you can't have heaved, hove he can't have heaved, hove we can't have heaved, hove you can't have heaved, hove they can't have heaved, hove
V-ing perfect
I can't have been heaving you can't have been heaving he can't have been heaving we can't have been heaving you can't have been heaving they can't have been heaving
Interrogative form
Simple form
can I heave? can you heave? can he heave? can we heave? can you heave? can they heave?
V-ing form
can I be heaving? can you be heaving? can he be heaving? can we be heaving? can you be heaving? can they be heaving?
Perfect
can I have heaved, hove? can you have heaved, hove? can he have heaved, hove? can we have heaved, hove? can you have heaved, hove? can they have heaved, hove?
V-ing perfect
can I have been heaving? can you have been heaving? can he have been heaving? can we have been heaving? can you have been heaving? can they have been heaving?
Interro-negative form
Simple form
can't I heave? can't you heave? can't he heave? can't we heave? can't you heave? can't they heave?
V-ing form
can't I be heaving? can't you be heaving? can't he be heaving? can't we be heaving? can't you be heaving? can't they be heaving?
Perfect
can't I have heaved, hove? can't you have heaved, hove? can't he have heaved, hove? can't we have heaved, hove? can't you have heaved, hove? can't they have heaved, hove?
V-ing perfect
can't I have been heaving? can't you have been heaving? can't he have been heaving? can't we have been heaving? can't you have been heaving? can't they have been heaving?