English verb conjugation
COULD PLUNK

Regular verb: plunk - plunked - plunked

Affirmation

Simple form	V-ing form
I could plunk you could plunk he could plunk we could plunk you could plunk they could plunk	I could be plunking you could be plunking he could be plunking we could be plunking you could be plunking they could be plunking
Perfect	V-ing perfect
I could have plunked you could have plunked he could have plunked we could have plunked you could have plunked they could have plunked	I could have been plunking you could have been plunking he could have been plunking we could have been plunking you could have been plunking they could have been plunking

Negation

Simple form	V-ing form
I could not plunk you could not plunk he could not plunk we could not plunk you could not plunk they could not plunk	I could not be plunking you could not be plunking he could not be plunking we could not be plunking you could not be plunking they could not be plunking
Perfect	V-ing perfect
I could not have plunked you could not have plunked he could not have plunked we could not have plunked you could not have plunked they could not have plunked	I could not have been plunking you could not have been plunking he could not have been plunking we could not have been plunking you could not have been plunking they could not have been plunking

Interrogative form

Simple form	V-ing form
could I plunk? could you plunk? could he plunk? could we plunk? could you plunk? could they plunk?	could I be plunking? could you be plunking? could he be plunking? could we be plunking? could you be plunking? could they be plunking?
Perfect	V-ing perfect
could I have plunked? could you have plunked? could he have plunked? could we have plunked? could you have plunked? could they have plunked?	could I have been plunking? could you have been plunking? could he have been plunking? could we have been plunking? could you have been plunking? could they have been plunking?

Interro-negative form

Simple form	V-ing form
could I not plunk? could you not plunk? could he not plunk? could we not plunk? could you not plunk? could they not plunk?	could I not be plunking? could you not be plunking? could he not be plunking? could we not be plunking? could you not be plunking? could they not be plunking?
Perfect	V-ing perfect
could I not have plunked? could you not have plunked? could he not have plunked? could we not have plunked? could you not have plunked? could they not have plunked?	could I not have been plunking? could you not have been plunking? could he not have been plunking? could we not have been plunking? could you not have been plunking? could they not have been plunking?