English verb conjugation
CAN HEFT

Regular verb: heft - hefted - hefted

Affirmation

Simple form	V-ing form
I can heft you can heft he can heft we can heft you can heft they can heft	I can be hefting you can be hefting he can be hefting we can be hefting you can be hefting they can be hefting
Perfect	V-ing perfect
I can have hefted you can have hefted he can have hefted we can have hefted you can have hefted they can have hefted	I can have been hefting you can have been hefting he can have been hefting we can have been hefting you can have been hefting they can have been hefting

Negation

Simple form	V-ing form
I can't heft you can't heft he can't heft we can't heft you can't heft they can't heft	I can't be hefting you can't be hefting he can't be hefting we can't be hefting you can't be hefting they can't be hefting
Perfect	V-ing perfect
I can't have hefted you can't have hefted he can't have hefted we can't have hefted you can't have hefted they can't have hefted	I can't have been hefting you can't have been hefting he can't have been hefting we can't have been hefting you can't have been hefting they can't have been hefting

Interrogative form

Simple form	V-ing form
can I heft? can you heft? can he heft? can we heft? can you heft? can they heft?	can I be hefting? can you be hefting? can he be hefting? can we be hefting? can you be hefting? can they be hefting?
Perfect	V-ing perfect
can I have hefted? can you have hefted? can he have hefted? can we have hefted? can you have hefted? can they have hefted?	can I have been hefting? can you have been hefting? can he have been hefting? can we have been hefting? can you have been hefting? can they have been hefting?

Interro-negative form

Simple form	V-ing form
can't I heft? can't you heft? can't he heft? can't we heft? can't you heft? can't they heft?	can't I be hefting? can't you be hefting? can't he be hefting? can't we be hefting? can't you be hefting? can't they be hefting?
Perfect	V-ing perfect
can't I have hefted? can't you have hefted? can't he have hefted? can't we have hefted? can't you have hefted? can't they have hefted?	can't I have been hefting? can't you have been hefting? can't he have been hefting? can't we have been hefting? can't you have been hefting? can't they have been hefting?