can heft
Regular verb: heft - hefted- hefted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?