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 can't fold you can't fold he can't fold we can't fold you can't fold they can't fold	I can't be folding you can't be folding he can't be folding we can't be folding you can't be folding they can't be folding
Perfect	V-ing perfect
I can't have folded you can't have folded he can't have folded we can't have folded you can't have folded they can't have folded	I can't have been folding you can't have been folding he can't have been folding we can't have been folding you can't have been folding they can't 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't I fold? can't you fold? can't he fold? can't we fold? can't you fold? can't they fold?	can't I be folding? can't you be folding? can't he be folding? can't we be folding? can't you be folding? can't they be folding?
Perfect	V-ing perfect
can't I have folded? can't you have folded? can't he have folded? can't we have folded? can't you have folded? can't they have folded?	can't I have been folding? can't you have been folding? can't he have been folding? can't we have been folding? can't you have been folding? can't they have been folding?