English verb conjugation
CAN FOLD

Regular verb: fold - folded - folded

Affirmation

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