can fold
Regular verb: fold - folded- folded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can fold
you can fold
she can fold
we can fold
you can fold
they can fold 	I can be folding
you can be folding
she can be folding
we can be folding
you can be folding
they can be folding	I can have folded
you can have folded
she can have folded
we can have folded
you can have folded
they can have folded	I can have been folding
you can have been folding
she can have been folding
we can have been folding
you can have been folding
they can have been folding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot fold
you cannot fold
she cannot fold
we cannot fold
you cannot fold
they cannot fold 	I cannot be folding
you cannot be folding
she cannot be folding
we cannot be folding
you cannot be folding
they cannot be folding	I cannot have folded
you cannot have folded
she cannot have folded
we cannot have folded
you cannot have folded
they cannot have folded	I cannot have been folding
you cannot have been folding
she cannot have been folding
we cannot have been folding
you cannot have been folding
they cannot have been folding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I fold?
can you fold?
can she fold?
can we fold?
can you fold?
can they fold? 	can I be folding?
can you be folding?
can she be folding?
can we be folding?
can you be folding?
can they be folding? 	can I have folded?
can you have folded?
can she have folded?
can we have folded?
can you have folded?
can they have folded? 	can I have been folding?
can you have been folding?
can she have been folding?
can we have been folding?
can you have been folding?
can they have been folding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not fold?
can you not fold?
can she not fold?
can we not fold?
can you not fold?
can they not fold? 	can I not be folding?
can you not be folding?
can she not be folding?
can we not be folding?
can you not be folding?
can they not be folding? 	can I not have folded?
can you not have folded?
can she not have folded?
can we not have folded?
can you not have folded?
can they not have folded? 	can I not have been folding?
can you not have been folding?
can she not have been folding?
can we not have been folding?
can you not have been folding?
can they not have been folding?