English verb conjugation
COULD FLUNK

Regular verb: flunk - flunked - flunked

Affirmation

Simple form	V-ing form
I could flunk you could flunk he could flunk we could flunk you could flunk they could flunk	I could be flunking you could be flunking he could be flunking we could be flunking you could be flunking they could be flunking
Perfect	V-ing perfect
I could have flunked you could have flunked he could have flunked we could have flunked you could have flunked they could have flunked	I could have been flunking you could have been flunking he could have been flunking we could have been flunking you could have been flunking they could have been flunking

Negation

Simple form	V-ing form
I could not flunk you could not flunk he could not flunk we could not flunk you could not flunk they could not flunk	I could not be flunking you could not be flunking he could not be flunking we could not be flunking you could not be flunking they could not be flunking
Perfect	V-ing perfect
I could not have flunked you could not have flunked he could not have flunked we could not have flunked you could not have flunked they could not have flunked	I could not have been flunking you could not have been flunking he could not have been flunking we could not have been flunking you could not have been flunking they could not have been flunking

Interrogative form

Simple form	V-ing form
could I flunk? could you flunk? could he flunk? could we flunk? could you flunk? could they flunk?	could I be flunking? could you be flunking? could he be flunking? could we be flunking? could you be flunking? could they be flunking?
Perfect	V-ing perfect
could I have flunked? could you have flunked? could he have flunked? could we have flunked? could you have flunked? could they have flunked?	could I have been flunking? could you have been flunking? could he have been flunking? could we have been flunking? could you have been flunking? could they have been flunking?

Interro-negative form

Simple form	V-ing form
could I not flunk? could you not flunk? could he not flunk? could we not flunk? could you not flunk? could they not flunk?	could I not be flunking? could you not be flunking? could he not be flunking? could we not be flunking? could you not be flunking? could they not be flunking?
Perfect	V-ing perfect
could I not have flunked? could you not have flunked? could he not have flunked? could we not have flunked? could you not have flunked? could they not have flunked?	could I not have been flunking? could you not have been flunking? could he not have been flunking? could we not have been flunking? could you not have been flunking? could they not have been flunking?