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 cannot heft you cannot heft he cannot heft we cannot heft you cannot heft they cannot heft	I cannot be hefting you cannot be hefting he cannot be hefting we cannot be hefting you cannot be hefting they cannot be hefting
Perfect	V-ing perfect
I cannot have hefted you cannot have hefted he cannot have hefted we cannot have hefted you cannot have hefted they cannot have hefted	I cannot have been hefting you cannot have been hefting he cannot have been hefting we cannot have been hefting you cannot have been hefting they cannot 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 I not heft? can you not heft? can he not heft? can we not heft? can you not heft? can they not heft?	can I not be hefting? can you not be hefting? can he not be hefting? can we not be hefting? can you not be hefting? can they not be hefting?
Perfect	V-ing perfect
can I not have hefted? can you not have hefted? can he not have hefted? can we not have hefted? can you not have hefted? can they not have hefted?	can I not have been hefting? can you not have been hefting? can he not have been hefting? can we not have been hefting? can you not have been hefting? can they not have been hefting?