English verb conjugation
COULD INTERFOLD

Regular verb: interfold - interfolded - interfolded

Affirmation

Simple form	V-ing form
I could interfold you could interfold he could interfold we could interfold you could interfold they could interfold	I could be interfolding you could be interfolding he could be interfolding we could be interfolding you could be interfolding they could be interfolding
Perfect	V-ing perfect
I could have interfolded you could have interfolded he could have interfolded we could have interfolded you could have interfolded they could have interfolded	I could have been interfolding you could have been interfolding he could have been interfolding we could have been interfolding you could have been interfolding they could have been interfolding

Negation

Simple form	V-ing form
I could not interfold you could not interfold he could not interfold we could not interfold you could not interfold they could not interfold	I could not be interfolding you could not be interfolding he could not be interfolding we could not be interfolding you could not be interfolding they could not be interfolding
Perfect	V-ing perfect
I could not have interfolded you could not have interfolded he could not have interfolded we could not have interfolded you could not have interfolded they could not have interfolded	I could not have been interfolding you could not have been interfolding he could not have been interfolding we could not have been interfolding you could not have been interfolding they could not have been interfolding

Interrogative form

Simple form	V-ing form
could I interfold? could you interfold? could he interfold? could we interfold? could you interfold? could they interfold?	could I be interfolding? could you be interfolding? could he be interfolding? could we be interfolding? could you be interfolding? could they be interfolding?
Perfect	V-ing perfect
could I have interfolded? could you have interfolded? could he have interfolded? could we have interfolded? could you have interfolded? could they have interfolded?	could I have been interfolding? could you have been interfolding? could he have been interfolding? could we have been interfolding? could you have been interfolding? could they have been interfolding?

Interro-negative form

Simple form	V-ing form
could I not interfold? could you not interfold? could he not interfold? could we not interfold? could you not interfold? could they not interfold?	could I not be interfolding? could you not be interfolding? could he not be interfolding? could we not be interfolding? could you not be interfolding? could they not be interfolding?
Perfect	V-ing perfect
could I not have interfolded? could you not have interfolded? could he not have interfolded? could we not have interfolded? could you not have interfolded? could they not have interfolded?	could I not have been interfolding? could you not have been interfolding? could he not have been interfolding? could we not have been interfolding? could you not have been interfolding? could they not have been interfolding?